I will not lay down the oil to start the firery debate between X11 and Wayland, but I run a Wayland desktop with no issues. Mint works well for a lot of people while being X11 based.
Desktop Linux is definitely ready for the masses, most of the big distros (Mint, Fedora, etc.) and desktop environments (GNOME, Plasma, Cinnamon, etc.) are very usable on most hardware and are much more stable than it was many years ago. I don't run into many large issues, and this is with the rolling release EndeavourOS (Arch-based). When I was using Mint for a bit, I had no issues at all!
For now, mobile Linux still needs to grow more before mass adoption, but it's a fun project if you're a developer and want something new and interesting!