The perfect poster boy is system scripts. They’re not even published usually, but being able to just generate < 500 line scripts for everything is a huge boon.
It goes hand in hand with Linux desktops too, because everything is just so much more scriptable. That used to be intimating, user unfriendly, and maybe it still is. But with AI it enables so many new avenues.
Now that LLMs can do the actual configuration, I started using NixOS and now all my config lives in one repo, and every quality of life improvement fans out to every machine without issue.
Since Claude (code) knows all about my system, it will also tailor solutions to it when I ask how to do something. Using it I can often find really neat solutions to whatever sys admin task I can imagine.