I get your point but I think your timeline is off. I don't have concrete data but from personal experience (myself, friends family) is say it's trivial to keep

I get your point but I think your timeline is off. I don't have concrete data but from personal experience (myself, friends family) is say it's trivial to keep books, records, even newspapers for decades. CDs in my world only go back to the 1990s. Tapes definitely didn't