I 'upgraded' Big Sur to Monterey on my Intel i9 MacBook and ended up going back to Big Sur via a CCC Clone I had created prior to the upgrade.
I'm now only on Monterey because it came preinstalled on my MacBook (M1 Max) that has finally just been delivered.
I am of the opinion now that I will always leave the OS that has come pre-installed on any system for as long as I possibly can. A yearly upgrade cycle for a major OS is too much IMO, especially since Apple cannot seem to iron out bugs and ensure the release is stable prior to launch. Sorry to say, but Microsoft has it right whereby they release periodic updates (albeit some large), but only upgrade the entire OS to its next release after a few years.
Hence I will stick to the OS that came with my MacBook for as long as I can, or until there is such a feature that I really do feel I absolutely need, before I 'upgrade' again.
In other words, Safari feels pretty 'snappy' to me at the moment! lol 🤣🤣