Why are no comments good for interoperability? Numerous formats can contain comments and I've never seen someone having a problem parsing them out, especially s

Why are no comments good for interoperability? Numerous formats can contain comments and I've never seen someone having a problem parsing them out, especially since they usually cannot be nested and/or allow you to skip until the next newline. I personally dislike it the most when you want to provide a commented example of your data format, vanilla JSON won't allow you to do that.