Similar to Mastodon, the different instances can represent single individuals, a small group of friends, a shared common interest, or host anything. It allows a “local” feed but can also connect to any part of the federated network. An instance might even choose to not broadcast to the larger federation at all.
These instances also spread out the workload of any single server by decentralizing the network, which allows Lemmy to grow without falling into a capitalist growth method.
I just watched a video that covered this in part. You want to keep the player immersed in the game experience. The more interfaces you give them, the more they’re taken out of the experience.
So autosaves are a great way to keep the user interacting with the game and feeling immersed.