Comment by ryukoposting

They should remove the phrase "every JSON file is also a valid YAML file" from the YAML spec. 1) it isn't true, and 2) it seems like it goes against the implication made here:

> This makes it easy to migrate from JSON to YAML if/when the additional features are required.

If JSON interop is provided solely as a short-term solution that eases the transition to YAML, then I applaud the YAML designers for making a great choice.