With all the talk of X11 removal there's one thing I missed, GNOME is on track to remove X11 support in GNOME 50, this lines up with Ubuntu 26.04, and they had plans to continue shipping X11 for that 1 final release.
I'm curious to see how this plays out.
In the past Ubuntu has patched features back in, and does effectively run a soft fork of GNOME but they may also just hold back a version.
Source:
https://gitlab.gnome.org/GNOME/gnome-session/-/merge_requests/99#note_2427404