I’m not sure if it’s due to the poor UX of WhatsApp. iPhone are ubiquitous in North America. So iMessage is everywhere. Gotta have them blue bubbles.

WhatsApp is popular, but usually with the android crowd or people with a lot of family in Europe.

I think now that Apple supports RCS it’s another nail in the coffin for WhatsApp in NA. I’d be curious to see stats in a year.