[benhurmarcel]

I thought Facebook was too popular to ever fall down. And yet here we are, it's easier than ever to ignore it.

Also, installing an alternative doesn't make you lose contact with anyone. You can set up Signal and make yourself available there without removing Whatsapp.

Many people slowly stopped using Facebook without ever deleting it. Still has the same effect.

[sdepablos]

I'd say they're two really different products, so even if FB popularity is falling dow, that does not mean that WhatsApp would follow. In fact I'm pretty sure that thanks to services like money sending WhatsApp is poised to grow in quite a few countries.