Bindle exists because the web is a bad archive of itself. This is the evidence, from the people who measured it, plus the few who built something about it. If you want one number: about a quarter of the pages that existed in 2013 were gone by 2023.
The measurement. 38% of pages from 2013 are gone; 23% of news pages and 21% of government pages have at least one dead link. Read this before any argument about 'the internet is forever'.
Zittrain found that half the links in Supreme Court opinions no longer point at what the justices cited. This is the readable, alarmed version of that research.
The original plea, from the person who invented the URL. Every excuse for breaking a link is listed here and dismantled. Nobody listened, which is the point of this list.
Lists on Bindle are hand-picked links with a note on each. Every link is archived, so it stays readable even after the original page is gone. More lists
One person's twenty-year practice of archiving everything he links to, with the tooling. The most complete practical guide there is, and proof that a private archive is a normal thing to want.
The overview, with the history of the term and pointers into the academic literature.
The public archive. 900+ billion pages. Everything else here stands on this; it is also one nonprofit, one lawsuit away from trouble, which is why copies matter.
The volunteers who show up when a site announces it is shutting down and grab everything before the lights go out. GeoCities, Google+, Yahoo Answers. The rescue squad.
Link rot as a legal problem: permanent citations for courts and journals, built by the library that measured the Supreme Court numbers.
Nielsen was already calling it a crisis in 1998 and estimating a 6% rot rate. The advice still applies; the rate got worse.