Surprisingly good article, thank you for posting it.
I got the sense that Gopnik is aware there may be places in the country outside of New York and Los Angeles — that he has a vague awareness about a sort of middle area where people might not live in apartments or be within a fifteen minute walk of everything in their life. Now, he never actually mentions this liminal space between the coasts, but it seems like he's inferred its existence based on the persistent popularity of cars. I appreciate someone with that kind of perspective writing for the New Yorker.