I was having a kernel panic on boot, I would work around it by loading the previous kernel. Turns out I had just ran out of space on my boot partition, but in my initial attemps to debug and fix I had gotten into a broken package state.

I handed it the reigns just out of morbid curiosity, and because I couldn't be bothered continuing for the night, but to my surprise (and with my guidance step by step) it did figure it all out. It found unused kernels, after uninstalling them didn't remove them, it deleted them with rm. It then helped resolve the broken package state and eventually I was back in a clean working state.

Importantly though, it did not know it hadn't actually cleaned up the boot partition initially. I had to insist that it had not in fact just freed up space, and that it would need to remove them.