Link rot is pervasive. A study found more than 70% of the URLs within the Harvard Law Review and other journals, and 50% of the URLs found within United States Supreme Court opinions, do not link to the originally cited information. <a href="http:&#x2F;&#x2F;papers.ssrn.com&#x2F;sol3&#x2F;papers.cfm?abstract_id=2329161" rel="nofollow">http:&#x2F;&#x2F;papers.ssrn.com&#x2F;sol3&#x2F;papers.cfm?abstract_id=2329161</a><p>A year or two ago I was doing a project about late 1990s gaming and so many of those sites are gone and were around before archive.org was around. And even if they are on archive.org it is often in a broken state. For example, there were all these Real Audio interviews with people like John Carmack and John Romero and they are just gone. (I actually tracked down one of the people that owned the site in question and he said he had them on a computer in storage and wanted to post them some day...)