I don't have issues with Nvidia drivers in Archlinux (using cinnamon and X) after pacman updates that sometimes update kernel and/or Nvidia drivers, I'm curious what's different in your setup to get these issues

Also, how are the graphics drivers affecting LUKS for you? They are two independent and unrelated things for me, Nvidia drivers aren't doing anything disk or pam related

> If they have a printer, connect it and show them how to print a page.

This however is the thing that doesn't "just work" for me, even with a common hp printer. The one time in a year you need to use the printer, something will have broken about its drivers again in Linux. I just transfer the pdf to the printer with a USB stick now