[rakoo]

You're both right and wrong.

In both cases, if users have an account on gmail and are using it, and gmail pulls the plug, then they can't use it anymore and can't migrate. The history is still there in the case of matrix, but they can't reuse the same account.

However if another user is homed on another server, they would still keep the knowledge and history on their side: gmail did pull the plug on xmpp, yet people are still using it. Their server still know who their contacts are, what room they're usually in, etc...

Matrix does have the advantage that the chat history is fully replicated on all homeservers so it makes history retrieval much saner, but that's it. Matrix doesn't route traffic (messages go from sender's homeserver to recipients' homeservers, that's it) and doesn't share client's information with the whole world.

[jauco]

Too bad. Well consider this a feature request then ;)