Earlier quoted context omitted.
I'm in Brazil as well. Everybody uses Whatsapp. It is now so entrenched into society that it turned to be part of its popular culture. When people say "I'm part of a group of old car enthusiasts", they meant they are part of a Whatsapp group in which they discuss old cars. Countless online services and apps were replaced by Whatsapp over the years, from the top of my head: all IMs, customer service apps, e-commerce (…
I'm having a hard time understanding how WhatsApp could be convenient enough to replace most online services and apps. Do you send text messages with some magic keywords to order at Burger King, or is there a person on the other end reading it, or how does that work? How do you pay? How do you browse the menu? I don't understand.
Some places might also try to use a more clever bot where you write down what you want and the bot gives a canned response if it thinks it understands what you meant (often just looking at keywords). These can be frustrating to use, just like those voice call bots that use voice recognition.