The first generation of suburbs is already failing as they become choked by the next generation of suburbs. Ferguson, MO was once a rich suburb of St. Louis. The suburbs of Nassau County, one of the richest US counties by median income, have been under state fiscal control since 2000.
It is far less efficient if you have a partner, children, pets, and like having peace and quiet. You know, things that make you happy.
In fact, suburbs can be some of the most limiting places for kids. Every activity needs a driver, so until you get a license you need a chaperone. You mostly can't walk to the shops, or the park, or your friend's house, with limited exceptions. And biking and walking are out of the question if you have to navigate a main suburban arterial to get there. As a parent your choices are to trap them in the house or spend your precious time driving your kids everywhere.