When a MMO game updates with tons of great new features, some players just wish they could stay at the old version. What if whenever a new version is launched, it’s going to be a new set of server based on the current game data, a new timeline? And so players can choose to opt-in for the timeline where the new version is released, or the one where nothing happened?
This is just a rough idea. It’s something I would like to see in many games, but I know it’s going to be really hard to execute and maybe the game system needs to be specifically designed to make the timeline branching easy.