I've got a similar anecdote: my friends in San Francisco or New York have moved over to Instagram entirely. My friends in the midwest or south (Chicago, Austin) still use Snapchat.
There's probably a network effect — a couple of strong links in the friend group in that city keeps it going. I also wonder if usage in coastal cities is a leading indicator.
There's probably a network effect — a couple of strong links in the friend group in that city keeps it going. I also wonder if usage in coastal cities is a leading indicator.