I was involved with the effort [to avoid] standardizing instant messaging back in 1999-2000. One of the products the company I was with at the time was offering was an instant messenger (with a twist that is not important for this story), so we tried to support all the prevailing protocols of the time (AIM, ICQ, MSN Messenger, Yahoo Messenger, PowWow, IRC, ... I don't even remember). And I was eagerly following the i…
XMPP is still bloated and the specs still suck, so not much has changed.