Mac Performance Guide on Upgrading to Big Sur, all downsides except the Thunderbolt Hub support
Mac Performance Guide has as an article on how the upgrade to Big Sur has been nothing but negatives, except that you need to upgrade to it to get Thunderbolt Hub Support which was added in Big Sur.
I know this site is usually very negative on the coverage of Mac OS upgrades, but the upgrades do seem to add more problems than they add, and usually add hits to performance.
And I have personally held off on the upgrade to Big Sur, though I really do need the Thunderbolt hub support so I can have more drives connected than I currently do.
Of course I also can’t upgrade because where I am currently working refuses to upgrade past Adobe Creative Cloud 2019, and that version does not work on Big Sur, you need to run at least 2020 to run on Big Sur. Now when the built in Speech to Text comes out of Beta maybe I can upgrade, though I might as well hold off for now.