WhatsApp is very common if anyone in your inner circle is international (as in lives in another country, not just from there). My family still uses it for our group chat bc one of my siblings used to travel a lot and live overseas, and we’re all American.
I have other friends from other countries who use WhatsApp to talk to people back home, but they also use standard messaging apps for talking to people here.
Hell yeah, it’s my stool stool