I use them for rough cutting big Frankenstein projects in plastic and a fair amount on wood.
They aren't a power tool I much associate with plastic modeling.
A recent really good use I found was putting together a railing around a deck using those sst aircradt cables with tightener hardware. I tried all kinds of ways to cut the cable but kept botching up the ends.
Dremel with cut off wheels does a nice clean job.
A trick someone taught me was to double up the thin abrasive disks. It really helps to keep them from shattering.
Bill