Making sure worlds are never lost

So I've had my worlds deleted and so have many of you and there is a easy fix that could save all of our future worlds that can be absolutely implemented. This has been a Microsoft feature for a while now and since Mojang is owned by Microsoft I do not see a problem with this. They should add Xbox Play Anywhere to their game so then everyone's worlds are cross synced and cloud backed so we do not have to lose our precious hours again like a hardcore world.