It is not intended to be anything more than a user experience report. This is a pretty reasonable explanation for the Matrix case: >When joining a room, it has

It is not intended to be anything more than a user experience report. This is a pretty reasonable explanation for the Matrix case: >When joining a room, it has to sync everything since the last time the client connected, or in some cases, a ton of history, like megabytes of it. In general you would expect that a stateful message protocol over HTTP over TCP/IP would have a rougher time than mostly stateless XMPP over TCP/IP.