That's a long study. I look at ebooks like I look at movies, CDs, etc. Unless I can my own CDs or rip my own movies, I don't have a digital "file" copy of tho

That's a long study. I look at ebooks like I look at movies, CDs, etc. Unless I can my own CDs or rip my own movies, I don't have a digital "file" copy of those items. Honestly, it has been difficult keeping up on that, improvements in displays (4K OLED TV, for instance), etc. It sucks and there should be a way of proving ownership such that you get access to the online digital versions. I have an extensive book collection and first several first editions in the areas I am interested in. I read the physical books from time to time, but for me the Kindle is a must have device that I use for hours every day - reading in bed, etc. Do I like it being a closed system? No. Do I have the energy to pirate things and keep on top of managing those collections - books are somewhat easier, but media is much harder - no.