Currently, X11 is not really being developed, just maintained, which is the real issue. In this piece they are questioning whether Wayland was a good choice or not. I am using Wayland, have for some time, and I do acknowledge it is still a work in progress, validating the articles list of 'issues' yet to be addressed, but unless you are running a really old system, I am guessing the complications affect a very minimal group of users. There are also workarounds, for example on KDE, the gtk apps don't adhere to those using the global menu. However, there is a fix to get around it.

In reference to using a completely different solution, isn't it a little late in the game (16 years in development?) I think we are stuck with Wayland, no?