[SpaceNoodled]

Oh good, another even more confusing YAML alternative that still offers less functionality, flexibility and readability than JSON.

[AlienRobot]

You could say the same thing about JSON compared to XML.

[sigzero]

Data only for JSON, it lacks just like everything else as a configuration language. Arguments against I have seen are too verbose, too strict, and no comments. I am sure there are more.

[SpaceNoodled]

It's not more verbose than this markup; strictness is only necessary for disambiguation; and comments are part of JSON5.