I have been using Macs daily for a decade. Big Sur is a big reversion in usability. Easily the worst MacOS update I can recall. The UI is a lot clunkier and slower and just harder to make sense of. They will throw it all out in 2-4 years and start over, that's about how long the UI stays stable.
I think the obsession with making everything white, with no clear distinction between window contents and window chrome makes it quite confusing. I'm hoping they revert this. Not everything has to be flat.
