@praveen @ronald @ravi But again, one of the big reasons people don't want to use #WhatsApp, or #Telegram (or in some cases, #Signal), other than having some aversion to big corporations, is because they want their conversations to be private and secure. And is a service requires your phone number than it is NOT private. And if you are having a conversation with someone and THEY have given up their phone number, then your conversations with them are not truly private.
I hate #Quicksy with the fire of a thousand burning suns because I feel it is the one #xmpp platform that just should not exist. It bring a level of insecurity to xmpp that has not previously existed, all because they are giving up privacy for convenience. Personally I simply would not trust that kind of platform. I understand what you are saying; there are people who are more than willing to give up privacy for convenience, in this case the convenience of only needing to use a phone number as an identifier. And in that case I say why not just leave them alone and let them stay on WhatsApp or Telegram or Signal; they are no worse off there and all their family and friends are probably there already. In fact I would argue that Signal is a far better choice for such folks, at least for now, because at least there they get more security than when using WhatsApp or Telegram and they will have a much larger community of people to talk to.