> Quite frankly, the main advantage of Whatsapp over Telegram is that it is more widely adopted. But beside that, not much.
Thing is I (and I guess most people) don't want to do app evangelism, but just use the existing communication protocols my peers use. People in your network will have their own networks, and so on, and telling them to quit them networks or to add another app to their phone is going to annoy them.
If you read carefully (something I strongly advise you to do) you will find out that I was talking about my family: they trust my judgement and I can bring them very good reasons for what I propose.
Regarding my other contacts' networks: I certainly do not impose other people what app to use, but at the same time I have no interest in doing something (e.g.: running an app I honestly don't like) just because everybody is doing it.
In all honesty, if someone has something to tell me or I have something to tell someone, we will surely find a way to communicate. Keep in mind that, at least for now, all mobile phones can make phone calls and send text messages (at least to negotiate other means of communication).
Thing is I (and I guess most people) don't want to do app evangelism, but just use the existing communication protocols my peers use. People in your network will have their own networks, and so on, and telling them to quit them networks or to add another app to their phone is going to annoy them.