system
A chat on subreddit /r/pcmasterrace
human
The only thing I know of that "broke" (minor visual bug that is easily fixed by resizing the window) is steam, though it's annoying that it is still an issue after so long.
gpt
For the average user its most likely fine... However if you service them? Oh lord...

On a fresh install (before updates) Alt-Tabbing can crash the UI. Snip was broken for a week iirc. Some updates won't kick in unless you manually reset time and date, pause and unpause updates. Certain systems that some with W11 can break on a fresh install because it "can't run windows 11" for some reason once you try to reinstall the OS. There's also driver compatibility issues i run into even today (prime example is no wifi drivers or ethernet, gotta use a dongle)