For example, there is a bug in the logitech mouse driver (combined with a specific AMD USB chipset) that occasionally does not restart properly after suspend. Coding agent fixed it (two lines of code) with a kernel module that automatically rebuilds after kernel upgrades.
Another example was I was getting hard crashes, because by default swap on fedora was in memory (IIRC, or it could have been me doing it wrong), so when there was a lot of memory pressure on my system from running larger LLMs it'd OOM and go down. This would have been painful to debug normally, but in <2mins a coding agent can read the kernel logs and fix it.
I also had it set GNOME up the way I like it, which would have taken hours manually, because I don't know what I'm searching for extension wise.
There's many other examples of just slightly broken stuff that coding agents can fix that was a total pain before and I just didn't have the patience to fix them manually.