Without speaking too much FUD from the X11 side the main issues facing workstation use cases are input handling and permissions. The current wayland party line is "just use dbus to communicate between windows." This is complete madness because it basically means that if you want programs to be able to work together and not steal each others keybinds they all have to depend on a message passing framework. Full disclosure I have done everything in my power to avoid installing dbus and having dbus dependencies, but it is getting harder and harder. That said, it doesn't matter what you think about dbus, it is completely unrealistic to expect that every piece of gui software written for linux to be rewritten to include dbus. This is basically going back to the days of cooperative multitasking and I think we all know how that ended, the overhead is just too high.