The obvious issue here is that we're intrinsically bound to the services that the people you talk with are themselves locked into. The pressure of your local crowd is surely a stronger determinant of which IM app(s) you use over the ones you like the best.

So yeah, I don't like Facebook's malevolent dictatorship over WhatsApp, but there's zero chance I could - or even would bother to - convince all my friends and family to make the switch.