Found in 2 comments on Hacker News
There was a book about this that used to be available on Prime Reading:

Balsamic Vinegar got a chapter, IIRC.

From my memory of reading Real Food, Fake Food, they don't care about the term "parmesan"--that term has been rendered generic, much like "champagne" in the US. But "Parmigiano Reggiano" is a protected term with a PDO ("protected designation of origin"). That's the one they care about.


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