[Andrew_nenakhov]

No. Please, stop it.

XML is not a problem. Parsing it is not a problem. Reading it is not a problem, too. None of the problems ever faced by us in the development of XMPP software would have been solved if it was switched from XML to JSON, nor made even a slightly easier to solve.

[wusspuss]

Literally half the OP article along with half the comments here explain how XML is a problem, how it is not equivalent to any other serialization format, etc. IMO the funniest example is stanza ids. That problem wouldn't exist even if they just used said XML in a remotely sane manner. But they really wanted to go all in on it. It's the XML mindset, the need to complicate things.