No one, either in comments, nor in article, actually touches on form factor. The fact is that sedans are only good for moving people, but there's better options for that: like cycling or train. The real benefit of an SUV's form factor (or pickup, or station wagon, or hatchback) is that you can move cargo with it, the kind of stuff that you can't move with efficient people movers.
How the automobile industry turned us into SUV drivers ( www.cbc.ca )