It’s funny how Steinberg and Reaper seem to do a better job in properly using all cores of an Apple Silicon than Apple / emagic themselves 
:
So it’s definitely possible to completely use all the cores almost completely. Ok, Apple reducing performance cores in more recent models plus zero information does not help here…
Maybe the configuration for audio workgroups can be optimized? I have no idea, just a hint for @taktik .
I also wonder: Can you integrate gaming mode into a daw?