He's not my Dad, but I do follow him on Mastodon... where he had this to say on the topic a few days ago:

https://layer8.space/@douglascrockford/113595316189101091

> If the comment is important enough to be put in the text and remembered, then make it an explicit part of the data structure. That will also make it easier for tools to find it and process it in a useful way. {"comment": ...}

> Use a preprocessor tool such as jsmin to remove the commentary before passing it to a JSON parser.

I kind of wish JSON had trailing commas though