I disagree… The problem actually is that Wayland is optional, and still is.
So everyone was dragging their heels (and some still are). If all the major distro’s set a cut off date, then things would speed up. The biggest reason for delay was Nvidia imho, so now that they’re sorted, it seems things are falling into place faster.
X11 still hasn’t solved any of their real issues, and its still a security nightmare (which can’t be fixed). Furthermore, most of the developers have moved off it.