A quarter of all webpages that existed at one point between 2013 and 2023 are no longer accessible, as of October 2023. In most cases, this is because an individual page was deleted or removed on an otherwise functional website.
Linkrot, especially in government and legal scenarios, is a tremendous problem, which is why we need services like the Internet Archive and Perma.cc. If you have the means, please consider supporting these, and similar, projects!