I'm still on Mojave - everything just works (knock, knock). The only way I see me going to Big Sur (I just skipped Catalina completely) will be if it comes on a new Mac and I have no say-so in the matter.
Long gone are my days of wild abandon, doing the first-day-adoption thing without a care or worry in the world. Screw that. I'm too old and impatient to be chasing/battling crazy gremlins/bugs, wondering if/when my Mac turns into a commemorative brick, etc. Apple's track record in the past five years on these things is a bit too spotty for my comfort.
I'm content to stay with what's working, and I'll stick my toe in the water (maybe) on some rainy Saturday down the road when I have absolutely
nothing better to do (and even then, I'll probably talk myself out it). I seem to have lost my sense of adventure and "oh, I can handle anything..." in recent years. Even with a backup and all, I just don't wanna deal with the hassle of a clean reinstall and fiddling with everything should turds hit the Lasko.
Mavericks was my last first-day thing, so...yeah. It, along with iOS 7, made me this way.
I'm more of a 7-month adopter these days.