> Practical decentralization, where you can talk to your friend that uses a different provider? Yes. You can find some lists of servers participating in the fe

> Practical decentralization, where you can talk to your friend that uses a different provider? Yes. You can find some lists of servers participating in the federation here: https://xmpp.org/getting-started/ https://xmpp.org/getting-started/ It's just that XMPP providers are not required to participate in the federation. Sadly, large instances like WhatsApp choose not to.