I thought about this yesterday.

There is actually something very cute and personal about WhatsApp.

I would go to Telegram to get movies or some restricted (conspiracy?) news feeds.

Spam, payment notes, etc. come via regular Messages/SMS.

But when something comes via WhatsApp... Dunno, it just feels more personal from me. As if, it's someone I personally know or care about / involved with.

I think some of this magic is preserved just because it does not add any other features that dilate the original use case and how it makes one feel.