SilverBlue is not a clone of any existing system. It's a brand new setup which treats the OS as read only layered images. A little bit like docker. The key feat

SilverBlue is not a clone of any existing system. It's a brand new setup which treats the OS as read only layered images. A little bit like docker. The key feature is that you can roll back a failed update by simply mounting an older image. You can also allow the user to customize things by adding on extra layers and if anything ever goes wrong, you just boot without the users layers to restore a stock system. For consumer level hardware this is essential to make sure it never ends up "bricked". The average user can not and will not reinstall an OS manually so if the OS gets in a bad state, the whole device is ewaste now.