Just to simplify Spittie a bit for clarity, under X you have dedicated 2d drawing APIs. Wayland uses EGL, and just drops 2d entirely, so the entire desktop is r

Just to simplify Spittie a bit for clarity, under X you have dedicated 2d drawing APIs. Wayland uses EGL, and just drops 2d entirely, so the entire desktop is running top of GLES. In order to run legacy X applications, Glamor is being baked into the X server so that X apps using Xrender can still work, but the binary drivers aren't using it yet, for a myriad of reasons.