I still think it's a shame that Amazon's Ion format never got widespread adoption. https://amzn.github.io/ion-docs/ https://amzn.github.io/ion-docs/ Superset

I still think it's a shame that Amazon's Ion format never got widespread adoption. https://amzn.github.io/ion-docs/ https://amzn.github.io/ion-docs/ Superset of JSON with many extra features that people in the comments here desire from their data-language, such as support for comments, timestamps and s-expressions.