This is your annual reminder to do a snapshot (timeshift or whatever you prefer) before doing relatively minor changes to your system.
I was supposed to be in bed now, but instead I am stuck troubleshooting xorg refusing to start after an apt-get dist-upgrade.
And as far as friendly reminders go, I should've given myself an unfriendly reminder beforehand, as it's not the first time....
UPDATE: Fuck nvidia 545. All my homies hate nvidia 545. 535 4 lyf!
Never used it myself and i am still a linix noob but what is the restore process if your OS isnt bootable?
If their like a rescue environment you boot into or something?
There are many approaches, depending on what broke. In my case the system was fine, just xorg being completely borked. So I logged into the console and fixed it.
If regular console doesn't work, something really went bad during boot, for which there's single-user mode which is kind of similar to safe mode from Windows 98 (I'm sure there's something similar in newer windows versions).
And of that doesn't work, there's the minimalistic rescue shell.
And if that doesn't work, you can boot from a USB or some other external media and try to fix your system from that, maybe even using chroot to use the system somewhat normally.