I don’t know what I was expecting but it looks more and more like the Messaging Interoperability the EU promised will be each gatekeeper essentially publishing their client to server protocol and then you can either use multi protocol messengers or transports. No s2s federation.
Looks like one might be able to log in through the (propriety) c2s API with third party IDs though.
@daniel that's sad but not unexpected.
Another point of view is to work with small actors to build that together.
And I think of course to #XMPP and #matrix and #Sip but also to #threema #wire and #deltachat for example!
Having a working instant messaging operability between open source actor looks like a good first step, isn't it?
