Then they would just use another Messenger or fall back on RCS/SMS.
The only reason WhatsApp is so popular, is because so many people are on it, but you have all you need (their phone number) to contact them elsewhere anyway
So if WhatsApp had an outage, but you needed to communicate to someone, you wouldn't be able to? Don't you have contacts saved locally, and other message apps available?
In most of Asia, Latin America, Africa, and about half of Europe?
You’d be pretty stuck. I guess SMS might work, but it wouldn’t for most businesses (they use the WhatsApp business functionality, there is no SMS thing backing it).
Most people don’t even use text anymore. China has it’s own Apps, but everyone else uses WhatsApp exclusively at this point.
Brazil had many times a judge punished WhatsApp by blocking it in Brazil, and all the times that happened, Telegram gained hundreds of thousands of new users.
Really? Please indicate your source for that claim that "most people don't even use text anymore" because I have never once in my life been asked about WhatsApp, but have implemented a few dozen SMS integrations after all the annoying rules changes where you have to ask "mother may I" and submit a stool sample to send an SMS message from something other than a phone.
