macOS Monterey

I have no issues with Monterey. As usual your mileage may vary depending on what macOS version you update from and Apps you have installed.

Monterey also has important security updates you may want to consider. What's new in the updates for macOS Monterey - Apple Support

They completely ruined iMessage, in both Big Sur and Monterey. Took out keyboard shortcuts, you can't close a conversation without deleting it, etc. I rolled it back to Catalina where I stay indefinitely.