. . . hijacked by picky grammarians who are more interested in showing off than discussing.

Nah, I think the subject has petered out and we're entertaining ourselves with the myriad leftover bits. (I did see some noun versus the adjective definitions before I posted my remark, but decided the usage, where I encountered on it, was rather on the adjective end of things. And by the way, just because a word was used in a certain way in a certain instance the past doesn't mean it was used correctly in that instance).

SRS