Today I learned about `loginctl` which, as expected, controls Linux logins. It's not quite as well documented as I'd like, but after tinkering with it for a while I've done some very cool stuff.
I put two NVidia cards into a 2U server and used `loginctl` to associate each one with an automatic login session in lightdm (plus one non-autologin session with the built-in VGA hardware). So without creating an xorg.conf at all, this system runs an X session for each card plus Steam to stream games!
After months of wincing every time I open a jar or turn a doorknob, I broke down and got an Ultimate Hacking Keyboard so that I could set up a split keyboard with angled-out tenting.
So far it's mostly just showing me all the places that I use the wrong fingers when typing, but the build quality is great.
I'm most surprised by the fact that the mouse emulation is actually decent! I didn't expect it to be really usable but I'm finding myself not grabbing the mouse as often.