I know people are hating on it, because who likes a new thing? Especially something that looks kinda like xml.
But I personally really liked the structure that xml forced, I just found it to be way to verbose. I find json and yaml and their depedancies on tabs to be confusing and the specs are often abused in ways that make them nearly as hard to parse for a human as xml.
This feels like a good middle ground, I hope it receives more support