Ubuntu 18.04.5 LTS with xubuntu-desktop installed
Upgrading gnome-shell from 3.28.4-0ubuntu18.04.3 to 3.34.1-1ubuntu1 broke my system and rendered it unusable. No login display appears (or appears as blank) because gdm3 freaks out.
Installing xubuntu-desktop fixed the problem and revived the system.
Now, the question is: is it possible to remove everything related to ubuntu-desktop that facilitates Ubuntu running on GNOME Shell and re-install it back anew to make it look like nothing happened?
sudo apt purge ubuntu-desktop
sudo apt autoremove ubuntu-desktop
commands only remove ubuntu-desktop and aisleriot gnome-mahjongg packages.