diff --git a/app/controllers/projects/merge_requests_controller.rb b/app/controllers/projects/merge_requests_controller.rb
index bea24d2b2040b24ae677237a8638c48adeacb0ba..af185887a8caae9ef41078845aed5c3921682f9e 100644
--- a/app/controllers/projects/merge_requests_controller.rb
+++ b/app/controllers/projects/merge_requests_controller.rb
@@ -21,7 +21,7 @@ class Projects::MergeRequestsController < Projects::MergeRequests::ApplicationCo
   before_action only: [:show] do
     push_frontend_feature_flag(:diffs_batch_load, @project, default_enabled: true)
     push_frontend_feature_flag(:deploy_from_footer, @project, default_enabled: true)
-    push_frontend_feature_flag(:single_mr_diff_view, @project)
+    push_frontend_feature_flag(:single_mr_diff_view, @project, default_enabled: true)
     push_frontend_feature_flag(:suggest_pipeline) if experiment_enabled?(:suggest_pipeline)
   end
 
diff --git a/app/serializers/diff_file_entity.rb b/app/serializers/diff_file_entity.rb
index c3826692c52f46d9d6e054e5bd5ea4425e0ca8c7..45c16aabe9e8fc348bdf28699adbe83b7daaf431 100644
--- a/app/serializers/diff_file_entity.rb
+++ b/app/serializers/diff_file_entity.rb
@@ -67,14 +67,14 @@ class DiffFileEntity < DiffFileBaseEntity
   private
 
   def parallel_diff_view?(options, diff_file)
-    return true unless Feature.enabled?(:single_mr_diff_view, diff_file.repository.project)
+    return true unless Feature.enabled?(:single_mr_diff_view, diff_file.repository.project, default_enabled: true)
 
     # If we're not rendering inline, we must be rendering parallel
     !inline_diff_view?(options, diff_file)
   end
 
   def inline_diff_view?(options, diff_file)
-    return true unless Feature.enabled?(:single_mr_diff_view, diff_file.repository.project)
+    return true unless Feature.enabled?(:single_mr_diff_view, diff_file.repository.project, default_enabled: true)
 
     # If nothing is present, inline will be the default.
     options.fetch(:diff_view, :inline).to_sym == :inline
diff --git a/changelogs/unreleased/feature-enable-split-diffs-by-default.yml b/changelogs/unreleased/feature-enable-split-diffs-by-default.yml
new file mode 100644
index 0000000000000000000000000000000000000000..9f703a226c63034216d3f6c4387a4be6d84b6c83
--- /dev/null
+++ b/changelogs/unreleased/feature-enable-split-diffs-by-default.yml
@@ -0,0 +1,5 @@
+---
+title: Diffs load each view style separately, on demand
+merge_request: 24821
+author:
+type: performance