I just moved on to Big Sur since I got an M1... the previous MBP was on High Sierra, so you can imagine my culture shock! Big Sur reminds me of nothing more than Windows XP, and that's not a compliment.
I’ve taken a big liking to Big Sur. It is a graceful evolution of the UI that needs a lot more precision work (like Preferences, the menu bar shortcuts and Notifications) but it’s a solid base for the next couple of years.