diff --git a/Cargo.toml b/Cargo.toml
index bf7a6a5b..36f37418 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -50,6 +50,10 @@ unexpected_cfgs = { level = "warn", check-cfg = [
 unreachable_pub = "warn"
 unused_import_braces = "warn"
 unused_qualifications = "warn"
+#too many cfgs; false positives with --all-features
+dead_code = { level = "allow", priority = 1 }
+# library consumer messages
+deprecated = { level = "allow", priority = 1 }
 
 [workspace.lints.clippy]
 branches_sharing_code = "warn"
@@ -57,8 +61,6 @@ cloned_instead_of_copied = "warn"
 dbg_macro = "warn"
 disallowed_types = "warn"
 empty_line_after_outer_attr = "warn"
-exhaustive_enums = "warn"
-exhaustive_structs = "warn"
 inefficient_to_string = "warn"
 macro_use_imports = "warn"
 map_flatten = "warn"
@@ -77,6 +79,7 @@ wildcard_imports = "warn"
 new_without_default = "allow"
 # Disabled temporarily because it triggers false positives for types with generics.
 arc_with_non_send_sync = "allow"
+exhaustive_structs = { level = "allow", priority = 1 }
 
 [profile.dev]
 # Speeds up test times by more than 10% in a simple test
diff --git a/crates/ruma-appservice-api/src/lib.rs b/crates/ruma-appservice-api/src/lib.rs
index 1a431ca7..f7873a8d 100644
--- a/crates/ruma-appservice-api/src/lib.rs
+++ b/crates/ruma-appservice-api/src/lib.rs
@@ -103,7 +103,11 @@ pub struct Registration {
     /// Whether the application service wants to receive ephemeral data.
     ///
     /// Defaults to `false`.
-    #[serde(default, skip_serializing_if = "ruma_common::serde::is_default", alias = "de.sorunome.msc2409.push_ephemeral")]
+    #[serde(
+        default,
+        skip_serializing_if = "ruma_common::serde::is_default",
+        alias = "de.sorunome.msc2409.push_ephemeral"
+    )]
     pub receive_ephemeral: bool,
 }
 
@@ -141,7 +145,6 @@ pub struct RegistrationInit {
     /// The sender is excluded.
     pub rate_limited: Option<bool>,
 
-
     /// The external protocols which the application service provides (e.g. IRC).
     pub protocols: Option<Vec<String>>,
 }
diff --git a/crates/ruma-client-api/src/keys/upload_signatures.rs b/crates/ruma-client-api/src/keys/upload_signatures.rs
index c8a6ecfe..0535c28e 100644
--- a/crates/ruma-client-api/src/keys/upload_signatures.rs
+++ b/crates/ruma-client-api/src/keys/upload_signatures.rs
@@ -96,6 +96,7 @@ pub mod v3 {
     }
 
     /// A failure to process a signed key.
+    #[non_exhaustive]
     #[derive(Clone, Debug, Deserialize, Serialize)]
     pub struct Failure {
         /// Machine-readable error code.
diff --git a/crates/ruma-client-api/src/profile.rs b/crates/ruma-client-api/src/profile.rs
index ebf71129..b3bcd552 100644
--- a/crates/ruma-client-api/src/profile.rs
+++ b/crates/ruma-client-api/src/profile.rs
@@ -1,4 +1,5 @@
 //! Endpoints for user profiles.
+#![allow(missing_docs)]
 
 pub mod delete_profile_key;
 pub mod delete_timezone_key;
diff --git a/crates/ruma-client-api/src/sync/sync_events/v3.rs b/crates/ruma-client-api/src/sync/sync_events/v3.rs
index b6f93375..76b854bb 100644
--- a/crates/ruma-client-api/src/sync/sync_events/v3.rs
+++ b/crates/ruma-client-api/src/sync/sync_events/v3.rs
@@ -368,7 +368,6 @@ impl Timeline {
 
 /// State events in the room.
 #[derive(Clone, Debug, Default, Deserialize, Serialize)]
-#[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
 pub struct State {
     /// A list of state events.
     #[serde(default, skip_serializing_if = "Vec::is_empty")]
@@ -388,7 +387,7 @@ impl State {
 
     /// Creates a `State` with events
     pub fn with_events(events: Vec<Raw<AnySyncStateEvent>>) -> Self {
-        State { events, ..Default::default() }
+        State { events }
     }
 }
 
@@ -500,7 +499,6 @@ impl RoomSummary {
 
 /// Updates to the rooms that the user has been invited to.
 #[derive(Clone, Debug, Default, Deserialize, Serialize)]
-#[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
 pub struct InvitedRoom {
     /// The state of a room that the user has been invited to.
     #[serde(default, skip_serializing_if = "InviteState::is_empty")]
@@ -521,13 +519,12 @@ impl InvitedRoom {
 
 impl From<InviteState> for InvitedRoom {
     fn from(invite_state: InviteState) -> Self {
-        InvitedRoom { invite_state, ..Default::default() }
+        InvitedRoom { invite_state }
     }
 }
 
 /// The state of a room that the user has been invited to.
 #[derive(Clone, Debug, Default, Deserialize, Serialize)]
-#[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
 pub struct InviteState {
     /// A list of state events.
     #[serde(default, skip_serializing_if = "Vec::is_empty")]
@@ -548,7 +545,7 @@ impl InviteState {
 
 impl From<Vec<Raw<AnyStrippedStateEvent>>> for InviteState {
     fn from(events: Vec<Raw<AnyStrippedStateEvent>>) -> Self {
-        InviteState { events, ..Default::default() }
+        InviteState { events }
     }
 }
 
diff --git a/crates/ruma-client-api/src/sync/sync_events/v4.rs b/crates/ruma-client-api/src/sync/sync_events/v4.rs
index cf3de2a9..51090201 100644
--- a/crates/ruma-client-api/src/sync/sync_events/v4.rs
+++ b/crates/ruma-client-api/src/sync/sync_events/v4.rs
@@ -12,7 +12,6 @@ use ruma_common::{
     api::{request, response, Metadata},
     directory::RoomTypeFilter,
     metadata,
-    room::RoomType,
     serde::{deserialize_cow_str, duration::opt_ms, Raw},
     MilliSecondsSinceUnixEpoch, OneTimeKeyAlgorithm, OwnedMxcUri, OwnedRoomId, OwnedUserId, RoomId,
 };
diff --git a/crates/ruma-common/Cargo.toml b/crates/ruma-common/Cargo.toml
index c851b822..b9c3862a 100644
--- a/crates/ruma-common/Cargo.toml
+++ b/crates/ruma-common/Cargo.toml
@@ -33,11 +33,6 @@ unstable-msc3932 = ["unstable-msc3931"]
 unstable-msc4210 = []
 unstable-unspecified = []
 
-# Allow IDs to exceed 255 bytes.
-compat-arbitrary-length-ids = [
-    "ruma-identifiers-validation/compat-arbitrary-length-ids",
-]
-
 # Don't validate `ServerSigningKeyVersion`.
 compat-server-signing-key-version = ["ruma-identifiers-validation/compat-server-signing-key-version"]
 
diff --git a/crates/ruma-common/src/identifiers/mxc_uri.rs b/crates/ruma-common/src/identifiers/mxc_uri.rs
index 5b1d3004..21edbfd4 100644
--- a/crates/ruma-common/src/identifiers/mxc_uri.rs
+++ b/crates/ruma-common/src/identifiers/mxc_uri.rs
@@ -21,6 +21,7 @@ pub struct MxcUri(str);
 
 /// Structured MXC URI which may reference strings from separate sources without serialization
 #[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[allow(clippy::exhaustive_structs)]
 pub struct Mxc<'a> {
     /// ServerName part of the MXC URI
     pub server_name: &'a ServerName,
diff --git a/crates/ruma-common/src/push/action.rs b/crates/ruma-common/src/push/action.rs
index cf4c0b99..b2883175 100644
--- a/crates/ruma-common/src/push/action.rs
+++ b/crates/ruma-common/src/push/action.rs
@@ -42,8 +42,8 @@ impl Action {
 }
 
 /// The `set_tweak` action.
+#[non_exhaustive]
 #[derive(Clone, Debug, Deserialize, Serialize)]
-#[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
 #[serde(from = "tweak_serde::Tweak", into = "tweak_serde::Tweak")]
 pub enum Tweak {
     /// A string representing the sound to be played when this notification arrives.
diff --git a/crates/ruma-events/src/direct.rs b/crates/ruma-events/src/direct.rs
index c25ebae4..8d14f781 100644
--- a/crates/ruma-events/src/direct.rs
+++ b/crates/ruma-events/src/direct.rs
@@ -1,6 +1,7 @@
 //! Types for the [`m.direct`] event.
 //!
 //! [`m.direct`]: https://spec.matrix.org/latest/client-server-api/#mdirect
+#![allow(unexpected_cfgs)]
 
 use std::{
     collections::{btree_map, BTreeMap},
diff --git a/crates/ruma-events/src/lib.rs b/crates/ruma-events/src/lib.rs
index 57fdd060..95fb2a87 100644
--- a/crates/ruma-events/src/lib.rs
+++ b/crates/ruma-events/src/lib.rs
@@ -102,7 +102,7 @@
 //! ));
 //! ```
 
-#![warn(missing_docs)]
+//#![warn(missing_docs)]
 
 use std::{collections::BTreeSet, fmt};
 
diff --git a/crates/ruma-identifiers-validation/Cargo.toml b/crates/ruma-identifiers-validation/Cargo.toml
index 05d9a5cf..a0783d5d 100644
--- a/crates/ruma-identifiers-validation/Cargo.toml
+++ b/crates/ruma-identifiers-validation/Cargo.toml
@@ -12,9 +12,6 @@ rust-version = { workspace = true }
 all-features = true
 
 [features]
-# Allow IDs to exceed 255 bytes.
-compat-arbitrary-length-ids = []
-
 # Don't validate the version in `server_signing_key_version::validate`.
 compat-server-signing-key-version = []
 
diff --git a/crates/ruma-identifiers-validation/src/lib.rs b/crates/ruma-identifiers-validation/src/lib.rs
index 79df092c..dbd935de 100644
--- a/crates/ruma-identifiers-validation/src/lib.rs
+++ b/crates/ruma-identifiers-validation/src/lib.rs
@@ -19,12 +19,10 @@ pub mod voip_version_id;
 pub use error::Error;
 
 /// All identifiers must be 255 bytes or less.
-#[cfg(not(feature = "compat-arbitrary-length-ids"))]
 pub const MAX_BYTES: usize = 255;
 
 /// Checks if an identifier is valid.
 fn validate_id(id: &str, sigil: u8) -> Result<(), Error> {
-    #[cfg(not(feature = "compat-arbitrary-length-ids"))]
     if id.len() > MAX_BYTES {
         return Err(Error::MaximumLengthExceeded);
     }
diff --git a/crates/ruma-macros/src/api/response/outgoing.rs b/crates/ruma-macros/src/api/response/outgoing.rs
index be790be5..b048469f 100644
--- a/crates/ruma-macros/src/api/response/outgoing.rs
+++ b/crates/ruma-macros/src/api/response/outgoing.rs
@@ -49,7 +49,7 @@ impl Response {
 										}
                                     }
                                 },
-                                "ContentDisposition" | _ => {
+                                _ => {
                                     quote! {
                                         if let Some(ref header) = self.#field_name {
     	                            		headers.insert(
diff --git a/crates/ruma-macros/src/events/event_enum.rs b/crates/ruma-macros/src/events/event_enum.rs
index e7b64128..dc524d10 100644
--- a/crates/ruma-macros/src/events/event_enum.rs
+++ b/crates/ruma-macros/src/events/event_enum.rs
@@ -125,9 +125,9 @@ fn expand_event_enum(
 
     Ok(quote! {
         #( #attrs )*
+        #[non_exhaustive]
         #[derive(Clone, Debug)]
         #[allow(clippy::large_enum_variant, unused_qualifications)]
-        #[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
         pub enum #ident {
             #(
                 #docs
@@ -389,10 +389,10 @@ fn expand_content_enum(
 
     Ok(quote! {
         #( #attrs )*
+        #[non_exhaustive]
         #[derive(Clone, Debug, #serde::Serialize)]
         #[serde(untagged)]
         #[allow(clippy::large_enum_variant)]
-        #[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
         pub enum #ident {
             #(
                 #docs
@@ -464,9 +464,9 @@ fn expand_full_content_enum(
 
     Ok(quote! {
         #( #attrs )*
+        #[non_exhaustive]
         #[derive(Clone, Debug)]
         #[allow(clippy::large_enum_variant)]
-        #[cfg_attr(not(feature = "unstable-exhaustive-types"), non_exhaustive)]
         pub enum #ident {
             #(
                 #docs
diff --git a/crates/ruma-macros/src/identifiers.rs b/crates/ruma-macros/src/identifiers.rs
index a53caf0d..9dddc616 100644
--- a/crates/ruma-macros/src/identifiers.rs
+++ b/crates/ruma-macros/src/identifiers.rs
@@ -87,7 +87,6 @@ pub fn expand_id_zst(input: ItemStruct) -> syn::Result<TokenStream> {
 
         #[automatically_derived]
         impl #impl_generics #id_ty {
-            #[cfg(not(feature = "compat-arbitrary-length-ids"))]
             #[doc = #max_bytes_docs]
             pub const MAX_BYTES: usize = ruma_identifiers_validation::MAX_BYTES;
 
@@ -386,6 +385,7 @@ fn expand_owned_id(input: &ItemStruct, inline_bytes: usize) -> TokenStream {
         impl #impl_generics std::borrow::ToOwned for #id_ty {
             type Owned = #owned_ty;
 
+            #[inline]
             fn to_owned(&self) -> Self::Owned {
                 Self::Owned::new(self.as_bytes().into())
             }
@@ -916,7 +916,7 @@ fn expand_as_str_impls(ty: TokenStream, impl_generics: &ImplGenerics<'_>) -> Tok
         impl #impl_generics std::fmt::Display for #ty {
             #[inline]
             fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-                write!(f, "{}", self.as_str())
+                f.write_str(self.as_str())
             }
         }
 
diff --git a/crates/ruma-macros/src/util.rs b/crates/ruma-macros/src/util.rs
index e7ea406d..01b01720 100644
--- a/crates/ruma-macros/src/util.rs
+++ b/crates/ruma-macros/src/util.rs
@@ -123,7 +123,7 @@ pub fn cfg_expand_struct(item: &mut syn::ItemStruct) {
     struct CfgAttrExpand;
 
     impl VisitMut for CfgAttrExpand {
-        fn visit_attribute_mut(&mut self, attr: &mut syn::Attribute) {
+        fn visit_attribute_mut(&mut self, attr: &mut Attribute) {
             if attr.meta.path().is_ident("cfg_attr") {
                 // Ignore invalid cfg attributes
                 let Meta::List(list) = &attr.meta else { return };
diff --git a/crates/ruma-signatures/src/functions.rs b/crates/ruma-signatures/src/functions.rs
index a2be550f..739244aa 100644
--- a/crates/ruma-signatures/src/functions.rs
+++ b/crates/ruma-signatures/src/functions.rs
@@ -245,7 +245,7 @@ pub fn verify_json(
             let signature = Base64::<Standard>::parse(signature)
                 .map_err(|e| ParseError::base64("signature", signature, e))?;
 
-            verify_json_with(&Ed25519Verifier, &public_key, &signature, &object)?;
+            verify_json_with(&Ed25519Verifier, public_key, &signature, &object)?;
         }
     }
 
@@ -599,7 +599,7 @@ pub fn verify_event(
             let signature = Base64::<Standard>::parse(signature)
                 .map_err(|e| ParseError::base64("signature", signature, e))?;
 
-            verify_json_with(&Ed25519Verifier, &public_key, &signature, &canonical_json)?;
+            verify_json_with(&Ed25519Verifier, public_key, &signature, &canonical_json)?;
             checked = true;
         }
 
@@ -651,7 +651,7 @@ pub fn required_keys(
         };
 
         let entry = map.entry(server.clone()).or_default();
-        set.into_iter()
+        set.iter()
             .map(|(k, _)| k.clone())
             .map(TryInto::try_into)
             .filter_map(Result::ok)
diff --git a/crates/ruma-state-res/src/event_auth.rs b/crates/ruma-state-res/src/event_auth.rs
index 2c7005f2..5bf5c537 100644
--- a/crates/ruma-state-res/src/event_auth.rs
+++ b/crates/ruma-state-res/src/event_auth.rs
@@ -329,7 +329,7 @@ where
             target_user_member_event.as_ref(),
             sender,
             sender_member_event.as_ref(),
-            &incoming_event,
+            incoming_event,
             current_third_party_invite,
             power_levels_event.as_ref(),
             join_rules_event.as_ref(),
@@ -412,7 +412,7 @@ where
 
     // If the event type's required power level is greater than the sender's power level, reject
     // If the event has a state_key that starts with an @ and does not match the sender, reject.
-    if !can_send_event(&incoming_event, power_levels_event.as_ref(), sender_power_level) {
+    if !can_send_event(incoming_event, power_levels_event.as_ref(), sender_power_level) {
         warn!("user cannot send event");
         return Ok(false);
     }
@@ -423,7 +423,7 @@ where
 
         if let Some(required_pwr_lvl) = check_power_levels(
             room_version,
-            &incoming_event,
+            incoming_event,
             power_levels_event.as_ref(),
             sender_power_level,
         ) {
diff --git a/crates/ruma-state-res/src/lib.rs b/crates/ruma-state-res/src/lib.rs
index f226c5e7..89d490aa 100644
--- a/crates/ruma-state-res/src/lib.rs
+++ b/crates/ruma-state-res/src/lib.rs
@@ -62,7 +62,7 @@ pub type TypeStateKey = (StateEventType, String);
 pub async fn resolve<'a, E, SetIter, Fetch, FetchFut, Exists, ExistsFut>(
     room_version: &RoomVersionId,
     state_sets: impl IntoIterator<IntoIter = SetIter> + Send,
-    auth_chain_sets: &'a Vec<HashSet<E::Id>>,
+    auth_chain_sets: &'a [HashSet<E::Id>],
     event_fetch: &Fetch,
     event_exists: &Exists,
     parallel_fetches: usize,
@@ -94,7 +94,7 @@ where
     trace!(map = ?conflicting, "conflicting events");
 
     let auth_chain_diff =
-        get_auth_chain_diff(&auth_chain_sets).chain(conflicting.into_values().flatten());
+        get_auth_chain_diff(auth_chain_sets).chain(conflicting.into_values().flatten());
 
     // `all_conflicted` contains unique items
     // synapse says `full_set = {eid for eid in full_conflicted_set if eid in event_map}`
@@ -237,13 +237,13 @@ where
 }
 
 /// Returns a Vec of deduped EventIds that appear in some chains but not others.
-fn get_auth_chain_diff<Id>(auth_chain_sets: &Vec<HashSet<Id>>) -> impl Iterator<Item = Id> + Send
+fn get_auth_chain_diff<Id>(auth_chain_sets: &[HashSet<Id>]) -> impl Iterator<Item = Id> + Send
 where
     Id: Clone + Eq + Hash + Send,
 {
     let num_sets = auth_chain_sets.len();
     let mut id_counts: HashMap<Id, usize> = HashMap::new();
-    for id in auth_chain_sets.into_iter().flatten() {
+    for id in auth_chain_sets.iter().flatten() {
         *id_counts.entry(id.clone()).or_default() += 1;
     }
 
@@ -449,12 +449,12 @@ where
     let pl = stream::iter(auth_events)
         .map(|aid| fetch_event(aid.clone()))
         .buffer_unordered(parallel_fetches.min(5))
-        .filter_map(|aev| future::ready(aev))
+        .filter_map(future::ready)
         .collect::<Vec<_>>()
         .boxed()
         .await
         .into_iter()
-        .find(|aev| is_type_and_key(&aev, &TimelineEventType::RoomPowerLevels, ""));
+        .find(|aev| is_type_and_key(aev, &TimelineEventType::RoomPowerLevels, ""));
 
     let content: PowerLevelsContentFields = match pl {
         None => return Ok(int!(0)),
@@ -514,14 +514,13 @@ where
 
     let auth_event_ids: HashSet<E::Id> = events_to_check
         .iter()
-        .map(|event: &E| event.auth_events().map(Clone::clone))
-        .flatten()
+        .flat_map(|event: &E| event.auth_events().map(Clone::clone))
         .collect();
 
     let auth_events: HashMap<E::Id, E> = stream::iter(auth_event_ids.into_iter())
-        .map(|event_id| fetch_event(event_id))
+        .map(fetch_event)
         .buffer_unordered(parallel_fetches)
-        .filter_map(|result| future::ready(result))
+        .filter_map(future::ready)
         .map(|auth_event| (auth_event.event_id().clone(), auth_event))
         .collect()
         .boxed()
@@ -544,7 +543,7 @@ where
 
         let mut auth_state = StateMap::new();
         for aid in event.auth_events() {
-            if let Some(&ref ev) = auth_events.get(aid.borrow()) {
+            if let Some(ev) = auth_events.get(aid.borrow()) {
                 //TODO: synapse checks "rejected_reason" which is most likely related to
                 // soft-failing
                 auth_state.insert(
@@ -558,22 +557,20 @@ where
             }
         }
 
-        stream::iter(
-            auth_types.iter().filter_map(|key| Some((key, resolved_state.get(key)?))).into_iter(),
-        )
-        .filter_map(|(key, ev_id)| async move {
-            if let Some(event) = auth_events.get(ev_id.borrow()) {
-                Some((key, event.clone()))
-            } else {
-                Some((key, fetch_event(ev_id.clone()).await?.clone()))
-            }
-        })
-        .for_each(|(key, event)| {
-            //TODO: synapse checks "rejected_reason" is None here
-            auth_state.insert(key.to_owned(), event);
-            future::ready(())
-        })
-        .await;
+        stream::iter(auth_types.iter().filter_map(|key| Some((key, resolved_state.get(key)?))))
+            .filter_map(|(key, ev_id)| async move {
+                if let Some(event) = auth_events.get(ev_id.borrow()) {
+                    Some((key, event.clone()))
+                } else {
+                    Some((key, fetch_event(ev_id.clone()).await?.clone()))
+                }
+            })
+            .for_each(|(key, event)| {
+                //TODO: synapse checks "rejected_reason" is None here
+                auth_state.insert(key.to_owned(), event);
+                future::ready(())
+            })
+            .await;
 
         debug!("event to check {:?}", event.event_id());
 
@@ -651,17 +648,17 @@ where
         .map(|(idx, eid)| ((*eid).clone(), idx))
         .collect::<HashMap<_, _>>();
 
-    let order_map = stream::iter(to_sort.into_iter())
+    let order_map = stream::iter(to_sort.iter())
         .map(|ev_id| fetch_event(ev_id.clone()).map(move |event| event.map(|event| (event, ev_id))))
         .buffer_unordered(parallel_fetches)
-        .filter_map(|result| future::ready(result))
+        .filter_map(future::ready)
         .map(|(event, ev_id)| {
             get_mainline_depth(Some(event.clone()), &mainline_map, fetch_event)
                 .map_ok(move |depth| (depth, event, ev_id))
                 .map(Result::ok)
         })
         .buffer_unordered(parallel_fetches)
-        .filter_map(|result| future::ready(result))
+        .filter_map(future::ready)
         .fold(HashMap::new(), |mut order_map, (depth, event, ev_id)| {
             order_map.insert(ev_id, (depth, event.origin_server_ts(), ev_id));
             future::ready(order_map)
diff --git a/crates/ruma/Cargo.toml b/crates/ruma/Cargo.toml
index a4f827b2..68624ad7 100644
--- a/crates/ruma/Cargo.toml
+++ b/crates/ruma/Cargo.toml
@@ -144,9 +144,6 @@ compat = [
     "compat-tag-info",
 ]
 
-# Allow IDs to exceed 255 bytes.
-compat-arbitrary-length-ids = ["ruma-common/compat-arbitrary-length-ids"]
-
 # Don't validate `ServerSigningKeyVersion`.
 compat-server-signing-key-version = ["ruma-common/compat-server-signing-key-version"]