"First week of JSON Feed" http://www.manton.org/2017/05/first-week-of-json-feed.html
I've been following the developments surrounding JSON Feed with interest as their approach seems so completely different from anything at the W3C.
Namely, it's mostly a bunch of long-term, experienced coders who've spent years dealing with RSS and Atom and are trying to make dealing with feeds easier.
They aren't trying to bring in a better architecture, add use cases or bridge gaps to future functionality.