Comment by CactusRocket

Also depends on where you're coming from. My friends use WhatsApp and I don't because of privacy considerations. If they switch to Signal, I might still not use it because they want my phone number (and their servers are centralized, owned by one organization). So for them, amongst each-other, it would be fine to all switch to Signal probably. But for those of us who have been avoiding it altogether so far, it might not change anything whatsoever.