Not as default as you might think. I made the attempt to get some non-technical friends on WhatsApp years back, and near as I can tell, none of them are on it a

Not as default as you might think. I made the attempt to get some non-technical friends on WhatsApp years back, and near as I can tell, none of them are on it at all. In fact, most of them never stopped using Snapchat and iMessage is basically dominant.