@sjw Yeah, and?
A lot of people, feed readers/aggregators included can't hep but butcher it into JSON.
Which are entirely different kinds of data formats.
XML is for text-based extensible formats.
JSON is just, here, basic raw text-based data structure.
For example, you entirely loose the extensibility bits with JSON.
This is probably the whole reason why Google wants to do create JSON feeds, 3rd part of EEE.