One of the best features of Valve's Steam platform is exactly that it gives users the ability to perpetually install the software they have purchased, even if the publisher other removes it from the platform. If users were allowed to resale their purchased games, it would be nearly at full par with first sale doctrine.

Digital systems are a modern bypassing of such prior conventions and laws, and it makes perfect sense to extend them in that direction with time.

Secondly, you should reread their post, it’s much broader than your interpretation. They were envisioning a world where the device and copying restrictions we have today don’t exist.

My reference to quantum was saying that this usage pattern would require something like quantum entanglement to replicate the state of which copy is active among all copies.

They can't, which is the same as it is now. DRM is a farce and everything is on The Pirate Bay. Which is why restricting libraries like this is ridiculous -- anybody who doesn't care to follow the law doesn't need to get a copy from a library, they can just download it from a piracy site. The reason you go to the library instead is that you want to follow the law.

That's how it works in every library system I have dealt with