None of those issues actually make X unusable. And I say that while writing this on an X1 Carbon running Debian testing using X in a multi-monitor setup (and yes, this is a totally plug-and-play setup with zero monkeying around in config files... a fact that, frankly, amazes me, having grown up hacking X modelines).
Wayland, by contrast, is literally unusable (as in, it lacks fundamental features that make it something people can't use) in many circumstances due to either compositor bugs, features that don't work by design, or features that don't work due to a lack of solutions or a lack of adoption of those solutions.
And I know this because I've tried to use it. I really like the possibilities it opens up.
But it's so far from mature, at this point, that it simply cannot act as an X replacement for most people.
Frankly, I'm a little shocked distros are making Wayland their default display server ecosystem, as it's an objective step backward for desktop Linux and I expect will scare a lot of neophytes away who wonder why the hell basic features like screensharing still don't yet work in their favourite application.
