I still buy books, mostly because I like the feeling of them in my hands when I read and the visual of filling up bookshelves with the ones I enjoy. I'm hoping that one day my kids read those books to some value as when I started reading I never really knew what to read and ended up going through a lot of garbage old literature.
I do agree with you as well, I remember a big thing about World of Warcraft was that there was a claim that Blizzard just didn't have the original game files one their servers anymore so they couldn't release vanilla WoW, but at the same time private servers could simply because of the physical media and archived information that existed. I'm guessing in large part this was just an excuse by Blizzard, and many people ate it up, but the idea that a company who made the game not having the original files is a really unsettling idea.
Another interesting thing was a talk by the guy who did the BBS documentary and was sued for millions, if not billions, back in the day. I think he was part of the Defcon scene and what stood out to me was that at one point he said something along the lines of it's weird that broke college kids could afford a hard drive with X gigabytes but not the content to fill it up, therefor piracy would exist. Today storage capacity has vastly increased and we simply don't care about it anymore which is odd, like what happened to that? It's also weird that there was this whole internet known as the BBS that just no one knows about it so people think something like Serial Experiment Lain predicted a bunch of stuff when all of it existed back then, just not how we know it today. Some guy has a good chunk of it preserved, but we're not really doing that.
Pardon the meandering rant, I'm a bit drunk.