Linux is my main driver for work, so I don’t have the same challenges as you do for gaming or graphics, but am interested in which distro you’re using?

There are warts definitely, but haven’t had the issues you point out with monitors or audio using Debian or Fedora. That said it still is a lot like Lego when it comes to desktop use - dozens of ways to build something and it can vary a heap in the different ways you approach it.

Agreed it is still a ways off mainstream with the exception of power users or very streamlined environments like the Steamdeck.