However, if the game is possible to run, that creates the opportunity for there to be new fans of the game. If you can't run the game at all, there's zero chanc

However, if the game is possible to run, that creates the opportunity for there to be new fans of the game. If you can't run the game at all, there's zero chance that can ever happen. Preserving the games themselves, including server components or emulators, is key to this. As it stands, it already requires there be someone with the personal interest in a specific game, and the technical ability to crack it. Without that, such a game won't be preserved no matter what. Requiring publishers to make such things available at some point can only help. It removes or mitigates that later requirement.