Yes, those things cost money, but the money that we want to make, we want to make it today. And this is how we make it. What economic incentive is there for preservation?
(/takes off devil's advocate hat and puts on flame suit)
Nintendo has shown the way, for better or worse.
Tightly managed first party IP with a lot of retro throwback games/compilations/crossovers/virtual console and an overly aggressive copyright approach to managing what people do with their IP (even if fair use).
Nintendo plays the long game. They do not compete directly with Sony, Microsoft and the like.
Especially when you have a passionate community willing to work for free to preserve things, am I right?
The economic incentives will only come when enough people stop buying these kinds of games. Whether or not that will ever happen remains to be seen.
What economic incentive is there for art museums? Maybe society shouldn't be designed primarily around economic incentives.