Ha, I stay corrected! Crawling back under rock to re-read WHATWG and historical W3C docs to fill the voids…

Note to self: Apparently, I mentally froze around 2009, so I have some decades to catch on. It seems the breaking point was after 2009 Hixie's WONFIX for adding keywords [0], at a time when both `keywords` and `description` were both swept aside into "MetaExtensions" [1]. The turning point I clearly missed came in 2010 [2] and got resolved through [3].

[0] https://lists.w3.org/Archives/Public/public-html-bugzilla/20... [1] https://web.archive.org/web/20090205191845/http://wiki.whatw... [2] https://lists.w3.org/Archives/Public/public-html/2010Feb/016... [3] https://www.w3.org/Bugs/Public/show_bug.cgi?id=7525