so that’s just a broken app

technically, yes. but at the end of the day, in the real world, that app would work fine on ~all but ~1 desktop compositor

wayland doesn't require SSDs, because it's not just meant for desktop computing. in the context of desktop computing, it's been a standard for decades now to have a title bar on a window, so it does make sense that apps would assume they can get one without having their own drawing code or relying on a third-party library!