Slight clarification, this isn&#x27;t new in Docker, you&#x27;re describing &quot;Immutable Systems&quot;.  It&#x27;s also not mutually exclusive with configuration management tools.<p>The systems management tools have been doing this a long time with baked cloud images, most prominently Packer invoking configuration-tools-of-choice for baking cloud images straight (which I&#x27;d say STILL has a wider adoption than Docker) and this can also be done inside Docker files, just like it can be done for AWS image baking.<p>You&#x27;re still going to have some things that need to be done in runtime, especially in managing your stateful servers.