[kelnos]

> I've never understood why the presence of Wayland means X.Org needs to disappear

It doesn't, except for a few annoying facts:

* Most of the people who maintained X.org are sick and tired of it, have moved on to Wayland (or completely unrelated) work.

* No one has stepped up to work on the non-XWayland parts of X.org to the level that's needed to describe it as more than just in maintenance mode.

* Popular GUI toolkits seem to be moving on. GTK, for example, still accepts bug fixes for the X11 backend, but they aren't really working on it. I expect at whatever point maintaining the X11 backend and keeping it up with core changes becomes too big a burden, they'll drop it entirely. I don't know what Qt's stance is, but I wouldn't be surprised if momentum has or will move more toward their Wayland backend.

The end result here is that X.org eventually will be the less-stable, less-featureful platform. It's going to take a while to get to that point (Wayland clearly still has a ways to go), but it feels inevitable, unless some interested parties decide to step up to maintain the non-XWayland parts of X.org and the X11 backends of the popular GUI toolkits.