[wlug] Do Scientists Take Backups?

Martin Eve, who works at Crossref, which manages the DOI system which tries to offer permanent online links to scientific publications and other digital documents, decided to do a survey of those links, to see how many of them would still actually resolve. The results were less than reassuring <https://arstechnica.com/science/2024/03/study-finds-that-we-could-lose-science-if-publishers-go-bankrupt/>. If/when a publisher goes bankrupt, what happens to their online archives? Do researchers who submit papers keep backup copies of their papers?