SKG doesn’t specify how companies need to solve the problem, only that games need to continue to function after the company stops supporting them.

For some games (e.g. Assassin’s Creed), that could be as simple as disabling the online aspect and having a graceful fallback. For others, that could mean letting people self-host it. Or they can provide documentation for the server API and let the community build their own server. Or they can move it to a P2P connection.

Game companies have options. All SKG says is that if I’ve purchased something, I should be able to keep using it after support ends.