Lower bandwidth for who? When images are cached on other instances, it allows two things:

• Load sharing. The original instance doesn’t have to serve the whole fediverse, but only its own users + 1 request per other lemmy instance.
• Data availability through redundancy. If the original instance goes down, the cached image is still viewable on other instances.

I like No Man’s Sky take on this, that seamlessly shifts from offline to online. I can stop/resume it without an hitch on my Steam Deck, even in multiplayer zones.

With Diablo IV, I get disconnected when there’s a light breeze.

If you’ve never played the original, take the Resurrected. They’re the same game, but Resurrected is beautiful. Be warned though that mechanically, it’s an old game, and I wouldn’t recommend it to anyone who hasn’t played it back then.