WhatsApp reigns supreme in India as well; we now have characters in TV shows and movies saying lines like, "I will WhatsApp you the details." WhatsApp might be Zuck's most significant purchase for global domination (at least for now).
Exactly. Facebook and WhatsApp likely have very little to worry about. Zuck knows that most users will keep using WhatsApp. However it does show that Facebook is not doing so well. The fact they need WhatsApp user data indicates problems in their "core" product.
Here in The Netherlands, we say "I will app you the details". In certain sentences, it does get a bit confusing.