At the Internet Archive, we are working on one aspect of this problem: https://fatcat.wiki/ https://fatcat.wiki/ Other notable efforts, mostly envisioned and l

At the Internet Archive, we are working on one aspect of this problem: https://fatcat.wiki/ https://fatcat.wiki/ Other notable efforts, mostly envisioned and led by librarians, are "dark" digital archives (LOCKSS, CLOCKSS, Portico, etc) which usually have a mechanism to flip and "trigger" public access if the publisher vanishes; microfilming and other microform throughout the 20th century; Hathitrust / Google Books; and as others have mentioned, scalable and sustainable (cost-wise) off-campus depositories.