I often hear the “comments aren’t supported” argument against JSON, but as a daily consumer, creator, and maintainer of JSON, I honestly can’t recall ever _really_ needing comments in JSON. It tends to be somewhat self documenting in my experience.
If JSON was developed more recently on places like GitHub, it would never have ended up like that with that many deficiencies.
This is where comments belong.
If the comments are so critical that it is a problem, then an accompanying file with those comments would be used. Otherwise, it's just a bunch of crocodile tears.