OK, I did a complete erase of the hard drive, fresh install of macOS Big Sur, installed Logic Pro X and Native Access, and linked a few libraries that I used in the project I'm testing. Here are the issues, straight out of the box:
1. getting the "AUHostingCompabilityService (Logic Pro) wants to make changes" prompt several times, every time I open the project
2. takes quite a long time to load the plugins (about the same time than my previous laptop, 2019 MBP with 32GB RAM
3. there's something not working right with audio, if I change the volume, stuff starts freezing up, if I press the Shift+volume knobs, no sound comes out as it should, etc. When I play back the project, it doesn't produce audio. See the video:
All in all, not working properly AT ALL. And this is just stock Logic, Kontakt, Kontakt 6 and a few libraries, nothing else.