I don't think the concern is about performance but compatibility. Even if all major developers (Autodesk, BlackMagic, Ableton, Steinberg, etc) are able to swit

I don't think the concern is about performance but compatibility. Even if all major developers (Autodesk, BlackMagic, Ableton, Steinberg, etc) are able to switch to ARM there is a myriad of plugin developers out there who might not be able to do it. Catalina and the 32bit EOL hit the audio world very hard.