I nearly lost a significant sale because a client claimed they sent me a message on WhatsApp about a new purchase, which I obviously never received. It was only that about a week later I made a client contact call that I found out and the sale was made.
More recently, my young son’s sporting clubs only seem to communicate crucial information via WhatsApp - is training going ahead, what time, which equipment to bring and changes in location etc.
The above really made me realise that the vast majority of people care not a jot about the same things I do in terms of privacy and autonomy.
Works well for me, but then a majority of people I talk to already had alternative platforms or installed them for my sake. The people who didn't bother aren't people I had that close a relationship with anyway.
If you do not have WhatsApp it has become very difficult to navigate life. For example, I had uninstalled it before going to college but had to reinstall it when I realized it might stop me from graduating.