Upon further reading, this proposal appears to have thoroughly been in bad faith with right-wing, socio-political virtue-signalling and/or advertising the X11Libre project as the actual goal.

Some highlights:

• X11Libre does not even have a Fedora package available on copr, yet the proposal was to replace the consistently maintained X.org server.
• Bonus to the above: The submitter conflates “not adding new features because X11 is planned for deprecation” with “unmaintained”.
• There is one maintainer of X11Libre and the fork is less than a month old.
• The maintainer of X11Libre purportedly “doesn’t believe in” automated testing.
• The maintainer, when actively contributing to X.org caused multiple breakages and made code review problematic with their 800+ merge requests. This includes breaking the ABI.
• On the code quality front, the maintainer also appears to have failed to understand the difference between XOR and exponents in the C syntax.

Sidenote: The two above make me suspect that AI slop may be prominent, beyond the general code quality issues.

• X11Libre openly admits that future Nvidia compatibility is unlikely.
• The cited benefit of the new features is adding security and the like. However, under the X11 model, use of these extensions is “opt-in”, making the utility and security benefits questionable (beyond the fact that all major DEs are moving to Wayland and deprecating X11 support).

Extra double-bonus Metux has history of being problematic enough that Linus roasted him for speading anti-vax disinformation.

EDIT: I remembered that there was something else that I found reading through that thread that makes it pretty clear that the change request was in bad faith.