I recently noticed that several exclusive systems in Bevy no longer need to be exclusive systems: change_window and play_queued_audio_system were the two I initially noticed. These were originally exclusive systems due to an inability to use NonSend resources in parallelizable systems: this limitation has since been removed.

These and any other similar cases should be converted to ordinary parallel systems (in the same stage) to improve the performance of Bevy's apps by reducing unnecessary blocking, and better communicate intent (we really don't need access to everything in the world).

bevy_mod_debug_dump may be able to assist you in grabbing a list of all of the systems to inspect. Or just search for uses of .exclusive_system in the code base using your IDE of choice.