Email would be great if people used it to write deep and interesting things like people used to do with letters. They say letter writing is a lost art, but it doesn't have to be. It just is right now. Maybe in another 20 years genuine communication and depth will come back in vogue.
So, given that email is only used for spam and the occasional file transfer, and given that I HATE HATE HATE HATE HATE HATE talking on the phone, text is the most desirable form of communication for the surface-level information exchanges that take place these days.