I don’t know, but I think it’s works on Wayland too. Probably something built in.

On Plasma Desktop, pressing Ctrl+Alt+ESC kills anything you click on next, instantly. There is truly nothing you can’t kill that way, even the desktop itself.

Well, don’t. Chances are your problem is fixed upstream, and if it really isn’t then wait before upgrading.

Sorry, I don’t really have an easy answer for you. First, don’t hold packages, of course that always leads to problems. Especially for release upgrades. Then try to get fully up to date, and if the release upgrade doesn’t work after that it might make more sense to reinstall. In that case backup your /home, reinstall the system, and restore your home.

Can you tell Cron to catch up on the things that should’ve happened but didn’t because the system was off?

Good thing it’s editor agnostic so everybody can do the right thing in the end and choose nano

Clearly this is LFS (Lute From Scratch)

Try running both pkcon update and then apt update; apt full-upgrade. Please let me know if that helped.

# nano /etc/systemd/{system,user}.conf
----
DefaultTimeoutStopSec=10s

You’re welcome.