Incorrect: libraries are indeed archiving scholarly journals like the ACM ones, even when they are online-only. For instance, CLOCKSS: https://clockss.org/
Essentially, CLOCKSS member libraries operate scrapers to download and archive copies of all covered journals. If a journal publisher disappears or deletes its back issues, the CLOCKSS members have agreements allowing them to republish the contents.
So there are a bunch of academic libraries holding copies of the content of academic journals for long-term preservatino.
Essentially, CLOCKSS member libraries operate scrapers to download and archive copies of all covered journals. If a journal publisher disappears or deletes its back issues, the CLOCKSS members have agreements allowing them to republish the contents.
So there are a bunch of academic libraries holding copies of the content of academic journals for long-term preservatino.