There are a few. There is still some software that has trouble with XWayland, which could hold back some users, and there are many who aren’t happy with the state of accessibility tools. But I don’t think this justifies the hatred towards it, as it’s not like these issues are unfixable. (Wayland now works better than X for me on all of my systems.)

It’s really disappointing how often disagreements in the open source world turn into religious wars. I think it’s because so many would rather yell and scream than contribute a single line of code. So much wasted energy.