Wayland does not support network transparency because you're supposed to use a VNC server. Making the X protocol network-transparent worked because draw command

Wayland does not support network transparency because you're supposed to use a VNC server. Making the X protocol network-transparent worked because draw commands don't make for much traffic, but today you'd be hard-pressed to find any X application that does not just send entire bitmaps (or rather, OpenGL textures) to the X server. It's similar to how Mac OS moved away from a PostScript-based display architecture, if my knowledge of Mac OS history is to be trusted. Having said that, I don't know if there are working VNC implementations for Wayland. Due to Wayland's security architecture, a VNC server (or any other thing that grabs screen contents) requires permission from (and thus cooperation with) the compositor.