The difference is most of those things aren't built with tangible, perpetual representations in mind. For literally all of the time that the written word has e

The difference is most of those things aren't built with tangible, perpetual representations in mind. For literally all of the time that the written word has existed, if you bought a physical copy it was yours for whatever version of perpetuity you'd like to use. Of course libraries exist, as do rentals, but it's clearly understood what the deal is with such services. The specific issue i see here is that this is changing retroactively and without recourse, the ability to download a copy of the item you purchased, which was the deal at the time of purchase. If you buy anything from now on, however, knowing the details of the sale, that's on you.