and to add to that, XMPP has extremely simple and familiar "WhatsApp"-like clients, so there's really not much of a barrier to entry. Especially if you join by

and to add to that, XMPP has extremely simple and familiar "WhatsApp"-like clients, so there's really not much of a barrier to entry. Especially if you join by a user sending you an easy-invite link (XEP-0401). All you have to do is pick a username and you are good to go.