What about wayback? Assuming running X by itself becomes real bad and undesirable, would wayback+Xwayland cover all those "can't Wayland" use cases? What remain

What about wayback? Assuming running X by itself becomes real bad and undesirable, would wayback+Xwayland cover all those "can't Wayland" use cases? What remains (besides better stability and wider availability of wayback) to be done?