Yeah that's a great start! And at the same time, the social network, i.e. friend network of people changes. In terms of size, composition, people are moving as

Yeah that's a great start! And at the same time, the social network, i.e. friend network of people changes. In terms of size, composition, people are moving as cohorts, but adoption is very different across age brackets, and there will be an age drift in adoption as the social network grows ... so there are just a ton of very biasing drifts going on.