[Macha]

Practical decentralization, where you can talk to your friend that uses a different provider?

Not just using the same client for Facebook and your corporate chat instance?

[zaik]

> 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/

It's just that XMPP providers are not required to participate in the federation. Sadly, large instances like WhatsApp choose not to.

[Andrew_nenakhov]

Practical decentralisation, as in thousands of servers connected to each other in one federation, working for 20 years.