Past-you, using the evidence that past-you had, came to a particular conclusion. Present-you, using more evidence, may come to a different conclusion. Future-you, using still more evidence, may come to yet another conclusion. This is as it should be; that's what evidence is for.
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.