There’s also the problem of bit rot. As floppies, CDs, and cartridges age, holes show up in their data. But getting the games onto stable media is only half the battle. You still need to find devices that can access them. Even big firms are nervous about sharing codes and production details of complex games, which can involve scores of patents. Moreover, games for different consoles were sometimes written in different programming languages; how do you make them universally accessible?
via theatlantic.com