Yes this. If you use gnome or kde you probably will have no issue with the transition to Wayland. If you use any other window manager then the transition will be painful because there's a bunch of things that don't simply map over from x WMs to Wayland compositors.

I just did this switch and found it incredibly frustrating. Simple things like, "I would like to be able to log out and return to my greeter" don't just work like they do in x.org, and it is dependent on which compositor you use.