But yes, there are use cases it doesn't cover. Example. My elderly mom uses Linux laptops that I've rigged to (1) always have an SSH connection open to my server machine, with reverse tunnels, and (2) run x0vncserver.
Modern security people would cringe, but this is the real world. I can open her desktop any time, from 700km away, and fix serious disasters like: She accidentally double-clicked an email and it opened up in a tab that obscures her message list (Thunderbird). This has worked very well to keep her online and happily emailing.
Where is the equivalent for Wayland? I get the impression that "it shouldn't exist because security" and therefore won't. Luckily, the show's not over yet. I run Fedora. The main spin won't do it any more, but the MATE spin is perfect. It comes up in MATE and it uses X! Still happy. Other laptop installations I have running probably use Wayland and as long as nothing breaks, I don't care.