I often find myself revisiting old posts and stories. As with any human artifacts, most things aren't worth revisiting or are only meaningful in the moment. If they're gone, few people miss them.
I'm a link hoarder myself (over 13k links on Pinboard: https://pinboard.in/u:pmigdal/). While I don't revisit most of them, some have proven invaluable for re-reading and sharing. I'm not sure about the typical half-life of internet content, but a lot disappears—whether because people stop paying for domains, official websites get reorganized (or their content removed), or other reasons.
This is where the Internet Archive steps in, doing the essential work of a digital librarian. I often share links from its Wayback Machine, which has been a link-saver more times than I can count.