I’ve had a lot of regressions, almost entirely around graphics drivers. I have like the worst case scenario. A 4K laptop (also dell) with an nvidia GPU in a prime configuration with the Intel graphics. Until very recently everything was laggy or unstable or unsupported. With recent drivers things have been more fine.
I also have weird audio issues like the card sometimes selecting a non available profile when disconnected from HDMI (hence why I asked about that)
CUPS has been really stable for me. Idk
Also yeah, docks seem to expose all of the bugs, even on windows. For the longest time I couldn’t get my keyboard to work if booting with a dock, and I still have weird resolution issues with booting while connected sometimes.



More details about the k-anonimity process. https://blog.cloudflare.com/validating-leaked-passwords-with-k-anonymity/
The short answer is that they download a partial list of passwords that hash to values starting with the same 5 characters as yours and then check if your password hash is in that list locally. This gives the server very little information about your password if it was not breached and more if it was (but then you should change it anyway), making an elegant compromise