Agreed. This post should be 100% be titled as supported instead of recommended.

I recall that John Mueller recommended[1] JSON-LD over the other options during a Google Webmasters office hours session.

Many of Google Search's Structured Data features[2] primarily have JSON-LD examples.

[1]: https://youtu.be/gS4_JH-QqSg?t=2085

[2]: https://developers.google.com/search/docs/guides/search-gall...