I believe one of the reasons that particular post is so out-of-date is because it's for the most part a recommendation for a 3rd-party tool, in response to a question soliciting recommendations for 3rd-party tools. Those 3rd-party tools posts get dated rather quickly, which is one of a few reasons why they have been off-topic on Webmasters SE for a while now. I just gave it a historical lock.
For this particular post, there's no good new resource to update the link to, because it's a download link to a specific piece of software that's no longer available from the publisher. I don't believe link rot is nearly as much of a problem for on-topic questions, because there are often alternative resources you can link (e.g. swapping in an MDN page for a dead article about an HTML element).
That said, before I locked the question I updated one of the links to an archive.org snapshot. In situations like this where the post is linking to a very specialized resource (a specific forum post from 2008), I think it can make sense to use an archive.org snapshot when available.