Account based worlds

Add a setting that finds worlds based on your account that way transferring worlds will be easier and worlds will not be lost if the device breaks. However I think that the world should be the last save of the original and the world that was taken from the account should not impact the original world and instead have its own save after, this is mostly for safety. I also don’t think worlds should be strictly account based just an option, I have lost many extremely important worlds since they were on a device that was broken and I know friends that lost worlds too. I think this would make for a great feature and even though I am not sure if its possible to get worlds from just the account it would be great to be able to play on the worlds that you love even after the original device is gone