But that's exactly the point: if it's not most people, then network effects are already greatly limited. And if those laptops aren't their personal laptops, the

But that's exactly the point: if it's not most people, then network effects are already greatly limited. And if those laptops aren't their personal laptops, then the odds of them having a personal messaging client open are even lower. Consider that most people do have their personal phone on them at all times. My point was exactly that pressuring people to have the client on their phone makes them check the messages more often, because that makes the service more attractive to other users. That, I think, is the reason most popular service are phone-first, even when typing messages is easier on desktop. (And no, I didn't downvote.)