Power on my dell laptop is getting wonky so I'm pulling the thinkpad x201 out of retirement. Hadn't booted it since 2019! For some reason the wifi wasn't working so connected it to wired ethernet.

Updated the channel to 23.11 and did nixos-rebuild switch. Had to fix a few things where packages no longer exist or options have changed. Rebooted and wifi is working now!

What other OS could you upgrade like that?