You're not describing a philosophical problem of "what's possible", as all of these things are perfectly possible on a desktop with Wayland and broader Freedesk

You're not describing a philosophical problem of "what's possible", as all of these things are perfectly possible on a desktop with Wayland and broader Freedesktop standards, and many have working examples currently. Wayland being as small as it is, is not supposed to be a restriction on features of your entire desktop. But there's no standard interopability with a standard X11 socket anymore. There's interopability with KWin and Mutter and wlroots and a bunch of other things through FreeDesktop standards (Wayland being among them). You might consider it a philosophical problem that Wayland is not trying to solve all the problems that X11 tried to solve. You might attach a lot of philosophical value to that architecture. But Windows, macOS, ChromeOS and Android seem to be doing extremely well on an architecture that is a lot less like X11 and a lot more like Wayland.