https://www.pewresearch.org/data-labs/2024/05/17/when-online-content-disappears/
Link Rot and Digital Decay on Government, News and Other Webpages | Pew Research Center
A related problem is old URLs which still exist but have different, unrelated content now.
>different, unrelated content now
That's a problem within AMZ now. A vendor will discontinue a product and substitute another --sometimes similar, but often not related-- product. I come across this when I go to 'buy again' from past orders.
I'm surprised the numbers are that low.
What happened in 2017? Is that just sampling error?