It's a fork of x.org that's trying to keep actively developing it more than the x.org developers are interested in doing (because they are working on wayland and see x.org as basically obsolete). That in itself is a reasonable goal but given the person responsible for it I would not be too optimistic about it.
XLibre is a fork of Xorg X11's codebase started by a developer who got kicked out of the Xorg project because he was making lots of changes that broke everything and had a hard time getting along with the other devs.
Another dev blindly applied his MRs assuming he had tested stuff before submitting the request and they had to go back and revert a bunch of stuff.
Broke nvidia compatibility, broke xrandr extension, and a bunch of other stuff.
This is false, he we the sole person submitting large amounts of code for about a year and was widely praised, until he forked and red hat went nuclear on his account for opposing their corporate goals, he was not kicked out for bad changes or anything of the sort. Trying to revise history on this is malicious.
The people like OA are spreading misinformation because the developer stated everyone was welcome to contribute and would oppose excessive politics. Keep in mind red hat is currently getting sued 3x over for blatantly racist policies which they used to ban other contributors and forced on their managers, they are evil people.
