I guess that also means the first stable release of Cosmic - congrats to the team! Honestly I expected it to be delayed more, so good on them for pulling that off. Hopefully it's actually stable.
It's been pretty stable for me since the later alphas when I switched. The only real hiccups I've noticed have been with keyboard only navigation in a few areas, mouse has always worked well. I'd guess that A11y is also less than ideal as well, so if you're reliant on a screen reader or the like, best to wait quite a while longer until iced etc. catch up.