Really? Like not letting apps draw over other apps? As far as I know Windows still allows that, so does even Mac OS. I don't know who in the industry decided that screenshotting is a bad behaviour and needs to be removed but maybe they should find a new industry, like fast food line work for example.
So the middleware stays the same but the underlying server changes? That's an amazing strategy I wish Wayland did this instead of breaking damn near everything with it's strange restrictions on behavior and overlays