In a group of ten people in the US, you may potentially be asking nine others to install WhatsApp.
Thats ignoring that some people (like myself) have philosophical reasons not to support Meta via WhatsApp. Just like others will not install Signal since it requires them to know your phone number (at least currently).
Then try a couple APAC countries, and people will ask why you aren't using LINE.
This has been going on for decades, ever since we saw AIM/MSN/ICQ and so on divisions country-by-country. In some cases it was simply who localized their app first.
Thats ignoring that some people (like myself) have philosophical reasons not to support Meta via WhatsApp. Just like others will not install Signal since it requires them to know your phone number (at least currently).
Then try a couple APAC countries, and people will ask why you aren't using LINE.
This has been going on for decades, ever since we saw AIM/MSN/ICQ and so on divisions country-by-country. In some cases it was simply who localized their app first.