alt Hacker NewsIf it was actually using XML as a markup language then that would be a reason to stick with it. But XML seems to be complicating things much more than it simplifies.
>> XML remains the best format for representing trees—deep hierarchies of nested data. JSON handles flatter structures well, but good messaging protocols are extensible: extensions can be embedded at different levels and composed together, like Lego bricks. That’s where XML shines.
Anything reasonable you'd be doing with messaging protocol is pretty flat.
It should be JSON with embedded XML for message text markup, playing to each ones strengths... not combining two sets of weaknesses by framing in XML and then using Markdown to format the messages.