Собственно, сабж: https://www.phoronix.com/news/X.Org-Server-Lots-Of-Reverts .
There was this revert for not handling copyright and license notices correctly.
...
Also merged this week was this big revert of prior «RandR cleanups» that ended up breaking at least some RandR functionality.There was also a revert to avoid unnecessarily breaking the NVIDIA driver. It was also commented by NVIDIA that some additional requests for other reverts are coming too.
There were also other reverts for code of questionable value. And other reverts making changes without knowing the prior knowledge for why some macros were added in the first place by X.Org developers.
And the list goes on with more reverts expected soon.
{парагаф про X11Libre} ...It's highly unlikely to succeed long-term given the very limited experienced developers / resources and none of the major Linux stakeholders (companies) backing it.