That signal move backfired for me. Before it was just whatsapp. Now with some folks from my generation moving to signal and the older folks from the parent's generation staying with whatsapp, I have had to maintain presence across 2 chat applications.
What's the actual cost here? You have one app open or another, no different to two distinct chatgroups in WhatsApp except for some small extra CPU cost for changing app focus if switching between them.
The only issue I've seen is when I want to add someone who's only WhatsApp to a Signal chat, which has happened maybe twice until they also joined.
Personally I feel good about taking even a small amount of Comms out of Zuckerberg's clutches
* Messenger for family and some friends
* WhatsApp for group chats and most of my friends
* SMS for older family members
* Signal and Telegram for a select few privacy-conscious friends
And at least one family member uses three of these, and it's a toss-up which one he'll use at any given time.
