Suburbs don't have to be substantially less dense. Heck, I think there are neighborhoods in my nearest city (Pittsburgh) that are less dense than my town just

Suburbs don't have to be substantially less dense. Heck, I think there are neighborhoods in my nearest city (Pittsburgh) that are less dense than my town just outside of it. Mine was built before cars were a given and when the trolley was a given. There are "exurbs" which are just abominations of low density and bad design. There are some lower density suburbs, and yeah, neither of those are sustainable.