Limitations? That depends. One big one for me on my home machines is presser foot lift. That will limit the thickness of what you can sew, as will the power. On multiple layers of webbing and 1000denier nylons, expect to hand turn a lot, and get a lot of needle movement. Also, the small bobbins are a pain on long runs. Better than hand sewing though. It should sew an underquilt, it just won't be the bee's knees for it.
An emergency of my own making...is still an emergency.