I wouldn’t trust a redirect to archive.org, because some of the content might have randomly been missed by the Wayback Machine crawler or the last crawled version might be missing comments that were added later. It also might have systematically missed certain things, such as deeply nested comment chains where you have to click “continue this thread” and posts with a lot of replies where you have to click “load more comments” (which is even less likely to be preserved, as it relies on AJAX).
I wouldn’t trust a redirect to archive.org, because some of the content might have randomly been missed by the Wayback Machine crawler or the last crawled version might be missing comments that were added later. It also might have systematically missed certain things, such as deeply nested comment chains where you have to click “continue this thread” and posts with a lot of replies where you have to click “load more comments” (which is even less likely to be preserved, as it relies on AJAX).