Honestly, I don't think there's really a "no necroposting" social norm here on DW as long as it's not... like, years and the author has changed their opinions on the subject. (You know, the equivalent of coming in to argue with someone about their politics long since they've changed.)

(This is why we have the "later I will eat these words" tag on old posts, haha. Though we rarely remember to use it.)