If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
If continuing the discussion becomes impractical, that means you win at open threads; a celebratory top-level post on the topic is traditional.
It wasn't actually on account of this discussion that I introduced my friend to LW (since I didn't read Swimmer and Adelene's comments till afterward)- I just posted the reaction here because it was funny and relevant.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
If continuing the discussion becomes impractical, that means you win at open threads; a celebratory top-level post on the topic is traditional.