I don't have a direct answer to your question, but it reminded me of a Tom Scott video where a library tries to keep a copy of everything you can think of (even stuff like leaflets) because it's not possible to know now what will be relevant/interesting in the future, so it's better to err on the side of keeping more stuff than necessary than to lose things that might be useful in the future. I suck at summarizing, so here's the link to this video: