So… the problem is they should just make better games? Really?
No, the problem is that there's no reason these games should have to disappear except that they were engineered to. All games are worth preserving, even bad games, even old games. It doesn't matter that my friends and I were perhaps the only people in the world playing Rainbow Six 3 at that moment in 2014, because that game having LAN meant that we could still play it, and we would always have the opportunity to play it. The Crew, much to my surprise, actually found a substantial audience, and it is a different game than its two sequels, but now Ubisoft can force obsolescence in that game that people today are still enjoying in an effort to get them to buy one of the sequels. They shouldn't have to buy the sequels to keep playing, and more than that, they should be able to go back to the old game whenever they want.