Comment by j1elo

To add a datapoint I can share mine: it's me who would be in a position to bootstrap the change in my circles, but I wouldn't use or recommend Signal as Whatsapp replacement until the core features are on parity, including history backups, which have always been a lagging userstory for Signal.

I think they have different (and somewhat opposing, even) targets, Signal wants to be extremely privacy protecting, and it's a disservice to their goals to sell them as a replacement for WhatsApp, because they're not.