Just needs a release that could contain bugs, could contain exploits. And current maintainers are not going to risk? I'm typing on X11 system, and it works, proving previous maintainers got it right.
I am fine if active developers make a fork, prove its worth, some distributions adopting it, finally fork merged into base with new leadership.
X11 just needs "a release" so that package maintainers and distros can push updates. If you fork it you only make things worse.