> A major difference is that in the US text messages and MMS are usually free, so there's not a lot of pressure to move to a different communication medium. I

> A major difference is that in the US text messages and MMS are usually free, so there's not a lot of pressure to move to a different communication medium. I'm not sure that's true. At least in my sample, there are quite a few people who explicitly ask you to use some chat app instead of texting them, because they don't pay for unlimited texting.