[zaik]

I don't use anything else, and people get tired of sending me emails rather quickly... Also after you have some number of people with XMPP addresses you actually start to feel some network effect! I suspect most people just use it with me, but I have seen some friends who didn't know each other before to use it. Since they were in the same group chat this likely was just the easiest option, instead of asking me for their telephone number.