Interesting article on Link Rot and its prevalence. According to the article even sources being referenced as early as 2018 have about a 60% Rot.I think all of us in this hobby can relate nor only to loss of articles but from sites, drivers, file repositories, etc....https://www.theverge.com/2021/5/21/22447690/link-rot-research-new-york-times-domain-hijacking