How did we slip away so far from this being fairly obvious? Cities have worked well this way for hundreds of years. Maybe the industrial revolution made cities too unpleasant? Were we too spoiled by the automobile industry and government roads? White flight from cities into the suburbs?
Never been to an US residential area and only "know" them from tv shows. Are they really pretty much completely devoid of businesses as this article indicates? No grocery / mom and pop stores, bars, restaurants, hair dressers etc.? That sounds very inconvenient. I always assumed you'd get some basic commercial everywhere.
The idea of walking anywhere is insane. To get from a typical suburb to the nearest business district or strip mall would usually require walking several miles along the shoulder, with frequent illegal crossing of arterial roads.