I don't think people that make and sell games should be legally compelled to release their games and game servers after they become economically unviable. instead they should be compelled to truthfully and clearly indicate that the product you're buying will stop working someday.

and some minority faction of game makers should make games to serve the "I want to play this game forever using a self hosted private server" market.

also maybe in general there should be a better understanding that games aren't art they are a business, if they were really in the art business they would care about art preservation and do all those things like keep the game playable after they shut down their servers, but they don't.