2023-06-26 UTC
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JKing The biggest time sink for me was that backcompat information isn't available in a clear, concise format in one place. You have to either scan multiple parts of the microformats2 page, or the individual v2 vocabulary pages. Actually, you have to look at both, because each omits information the other has. And the test suite also relies on stuff neither documents (viz. hNews), and contradicts the documentation in a few places.