At least some of those aspects are only temporary, if they are an issue at all: Already in the 90s we had 10MB games that were shipped on a CD with the rest of the CD being filled with the game soundtrack as CD Audio. Pirating the whole game including the soundtrack was unrealistic for most people back then, but these days you'd laugh at the size. The same will be true for this generation's "huge" games in just a few years. The real obstacle to preservation are the DRM schemes you mentioned.