Post #1332104

The protocol is still experimental, so no client should expect it to be present in a compositor (and there are for certain compositors which will never have it). Also, the xx-zones protocol now only addresses xy-positioning, the z-positioning was spun out into `xdg-toplevel-groups`[1] prior to the merge and may get wider support. In any case, all of this is positive news for complex professional or multiwindow apps on Linux/Wayland! 2/2 [1]: https://gitlab.freedesktop.org/wayland/wayland-protocols/-/merge_requests/471