In my experience, Facebook is the platform which is most tied to people you actually have interacted with in real life, and that's by a large margin. I know th

In my experience, Facebook is the platform which is most tied to people you actually have interacted with in real life, and that's by a large margin. I know the reddit account of like 1 person I know IRL (I don't even know my wife's account). ...but my facebook friends consist of basically everyone I know that still has a facebook. A lot of that is just the network effect and momentum, but still.