There’s usually nothing from an old thread that can’t be better addressed with a new one. People click on those old threads and don’t realize they’re reading posts from several years ago, so it’s confusing, for starters.
If you have a good reason to bump an old thread on a unique topic, it might be perfectly fine. But if your bumping a thread with the sole intent of “Look, I’m smart” or “Look, you’re dumb” then... well, most of those are typically pointless. Even then, I’d rather just see a new thread with a link to the referenced post and a bit of explanation.