People occasionally repost content on forums. Usually it's because the OP hasn't seen it before and thought it would be good to share. As long as it's not excessive it can show a new bunch of people something they might not have seen before.

e.g. I've been on HN for a few years and have never heard of this.

Cool. I thought there was a new features or release. It’s a great tool. I use it VIM and VSCode