It doesn't look very big, based on the size and number of windows, and the seat numbers (70-100) are much lower than the highest I've seen for the biggest jets (several hundred passengers). What am I missing? Is there some funky economic scaling effect that makes planes in a middle size range like this rare and unprofitable while bigger and smaller ones do fine? I never imagined that before but can see how it would be possible, but then I still don't know why it would be called "super"...