2 points
Win11 is basically just UI lift to Win10, the core OS is exactly same.
They dropped lot of support (ie11, classic bios, non-tpm2.0, 32-bit), which most are IMO just good because it forces adoption. I think those are overblown, people just hate the UI changes.
Been using it since the launch, and the issues have mainly been similar to just win 10 build upgrade issues.