I worked on a game called Minecraft Earth and it was a service-oriented game where you could collect things and play Minecraft in AR (fun project, not very fun game lol). It shut down a few years ago and we didn't get a chance to add an offline-only mode for even simple AR building, so now no one will ever be able to go back and play that game. It makes me really sad to see a whole product, a whole codebase just go poof.