As previously mentioned, the internationalization odyssey I completed with RFC 7564 got its start innocently enough through the need to modernize the handling of Jabber IDs (as I recall, Alexey Melnikov, applications area director at the time, made me promise that I'd correct the internationalization of JIDs at the IETF before he would sign off on RFC 6120, the core spec for XMPP). Now, all these years later, those corrections are finally done in the form of RFC 7622. Well, that only took a bit over 5 years!.