These changes would only affect GNOME and the session. Apps would still be able to use X11 through Xwayland.

Fine by me.

I still run a few solid, legacy X11 apps, and I use X11 forwarding for clipboard sharing and occasionally running apps remotely. So long as those things still work I’m fine.

I don’t run Fedora, but I’m assuming Debian and Ubuntu based distros will remove X11 in a similar way.

If anyone was gonna do it first, it would be Fedora. It'll be interesting to watch the fallout from it in various avenues afterwards. Gaming in particular since Fedora has been gaining traction as a gaming distro in the past 2 years