Earlier quoted context omitted.
The US market standardized on mobile plans with unlimited texting a long, long time ago, so I think this caused people to mostly stick to SMS/MMS for communication since it was the path of least resistance. I don't know what the situation in Europe is like now, but in the past I remember it being difficult to find plans without very small SMS caps when traveling. That could be why Europeans naturally gravitated towar…
Unlimited SMS plans have been a thing in western europe for the past 15 years, at least. People switched to whatsapp because you can send pictures, not only text.
It clearly shows that people in Europe, South America and Africa are huge users of WhatsApp and only 18% use it in the US.