Except: 1. It's Wayland-to-Wayland (which means you're much more limited to where it can run than X-to-X, where's the MacOS or Windows or BSD Wayland build?). 2. It's not integrated with ssh (X forwarding is part of the protocol). 3. You need it on both the client and the server, so you need to work out how to get it onto the server.