I admire the effort to fix things too. But this is exactly how we end up with 15 competing standards (https://xkcd.com/927/), each a little different, and no one can tell which library or package can parse which format any more.

I'm also not convinced that the small usability benefits of these alternative formats outweigh the burden of stumbling across them in different projects and then having to remember which parser works with which format.

If I had to choose between living with one canonical, well-established format like JSON and a jumble of 15 incompatible formats, I’d choose the single, well-established one every time.