while Debian is still deciding if they ship with Wayland by default or not, Fedora and KDE are planning to already completely drop x11 for their next release (they ship Wayland by default)
Fedora 40 with kde plasma 6 dropped a day or two ago, and they did remove x11, you have to get it from the repo in case you want it, otherwise, it only comes and is planned for wayland, which I believe is great, for once it does seem like the year of wayland
I was kidding about Fedora but Red Hat can actually afford to do that. They're not a generalist distro, they can and should offer their customers a very specific desktop stack.
Part of the reason red hat uses gnome is because it is the only desktop that meets many accessibility requirements. It would be a huge engineering effort to bring any other desktop up to par in that regard. Most graphical Linux software is really far behind in accessibility.
It doesn't have to be KDE. That was just the joke for Fedora.
Unlike Fedora, Red Hat can actually afford to use a single DE and a very specific graphics stack and to get rid of X completely. They don't have to support the full breadth and legacy of Linux desktop apps. For Red Hat machines the desktop is just a means to an end – it facilitates access to certain GUI tools.