"Cutting in very restricted spaces, can't think of anything else offhand"
Dawg toenails. Deburring small castings (I just completed half a dozen model A in-head thermostat housings). Engraving identification marks in odd places. Grinding "just a hair" off of various parts for a better fit (craftsmanship these days is lacking in store-bought everything ... ). Touching up blades on garden tools (not sharpening, that requires more horsepower) ...
I could go on. I use a couple different Dremels regularly. It's not just a toy for crafters.