[KorematsuFred]

I sort of agree. I call my mom on Whatsapp and there is not way this can change. Both of us are going to use Whatsapp. This is just an anecdotal example of network effects.

But this is also not a winner take all market as I think of it. I am a heavy user of telegram and massive broadcasts happen on Telegram. College students, Twitter handles banned on Twitter etc. have switched to telegram. You subscribe to a channel of a banned user and there is nothing Telegram can do about it.

Signal is especially popular among my political activist friends and few other friends.

Kik remains popular for some narrow cases I will not mention here.