Why do you keep stating things you can’t find untrue with a moments search?
Yes, the Library of Congress actively collects old audio (and even has 450,000 of those old 78s you claimed they don’t gather, and around another million unpublished ones). They have funding and mandates to do so.
This entire thread is you posting opinion as fact, but these opinions are demonstrably false. Before posting things as true please do some due diligence.