I was researching John Dee and stumbled upon https://johndee.org. Yesterday morning it provided an original study of the man which was the only one at the time to draw from all his texts. I'm not sure if anything like it has been produced since. The same afternoon, it became the homepage of some service provider that only lists their domains. The content's gone. Archive.org has a a copy from last Tuesday but the deeplinks provide a 503. Luckily archive.ph still has the actual content. But anyone who encounters a direct link isn't going to bother digging into the archive, and it disappears from search engines. This is how the Internet shrinks.