In preparing for the GNOME 50 Alpha release, the "50.alpha" tags just occurred for the Mutter compositor and GNOME Shell. Most notable with GNOME Mutter 50 Alpha is the X11 back-end indeed being removed to focus exclusively on the Wayland session...
Source: https://www.phoronix.com/news/GNOME-Mutter-Shell-50-Alpha
Aggregated via Linux News
Source: https://www.phoronix.com/news/GNOME-Mutter-Shell-50-Alpha
Aggregated via Linux News

