Three X11 Session Exits Compared: GNOME Went Default-Off First, KDE Named Plasma 6.7 the Last, and a Fedora 44 Update Removed Plasma's Session
GNOME, KDE and Fedora ended X11 sessions by different routes, per The Register, LWN.net, Phoronix and Linuxiac, and the steps, evidence and fallbacks they offered differ for tool authors and packagers.