If one would've come to HN and read the last few months worth of posts you'd come to think that a lot of people from around the world moved to Signal. But then again this is a reminder about how little HN represents compared to the general population's tech choices.
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.