They do, yes. Nobody will prevent anyone trying to port Wayland compositors, either. If that's your itch, feel free to go for it. But the Wayland compositor au

They do, yes. Nobody will prevent anyone trying to port Wayland compositors, either. If that's your itch, feel free to go for it. But the Wayland compositor authors will steer their software to run effectively on Linux. If that means it is difficult to port to Windows or Mac (whether because they miss dma-buf, or demand something that the native platform won't provide to non-system process), so be it.