All things being equal (money, space, etc), would you rather own copies of the books you read? Or borrow them?
In that perfect world, I think I’d still borrow. You see, I’m really picky about what I buy, especially when it comes to books. There are plenty of books that I’ve loved that I don’t want to buy, because I won’t reread them, and to me, that doesn’t justify the price. I do reconsider if I find it at a thrift store for a dollar or two, but money is no object in this exercise. While in this scenario space and money aren’t considerations, to earn a spot on my bookshelf, it has to be a book I’ll revisit—theoretically, of course, because I don’t really have time to reread anymore unless I carve it myself. I’d also be only limited by the limitations of my library system, which includes out-of-print books and specialty books that might be more expensive to find for purchase and harder to find.