So what? Like if something was posted years before should it never be posted ever again? We are talking 5 years here, and the information hasn’t become deprecated or outdated
Not at all! As the other commenters have pointed out, no criticism is implied. Reposts are fine after a year or so. This is in the FAQ: https://news.ycombinator.com/newsfaq.html.
I do not believe that is dang's point. He often posts comments like these under recurring posts, I assume in hope that the past discussions could also be of interest to the readers.