Does X11 still matter?

[roxchgt]

This is a free users' discussion about the plausibility of putting effort in X11 while Wayland seems to be the future of display server on Linux. Unfortunately some opinionated users ran this debate formerly on the wrong place: The Road to Linux #7015 and lead that important thread to get distracted from its main purpose and finally get locked. So let's keep the free speech alive, but appropriately and constructively. go on...