It would be useful to know whether the same trends have happened in other places. If iPhones are causing people to be less social, we should see similar trends in France and Japan.

If we didn’t see the same trends, it points to reasons more specific to the US.

Japan is not necessarily applicable 1:1; homes are smaller and space is at a premium so people are far more likely to just go sit somewhere… and nowadays they are usually on their phone.