There's no shortage of third places in the American suburbs, you just have to drive to them. I'm sympathetic to the argument that walkable third places are better third places because I lived car-free in New York City for a decade and enjoyed many of them. But living in the suburbs or exurbs doesn't inherently mean you don't have access to shared communal spaces.

If I believed there is a crisis of isolation in the United States and degradation of community, I would first focus on more recent technologies, say ones introduced around 2007, than on technologies introduced in the early 1900s.