> This sounds good as an idea but often does not pan out, usually its just the base OS or base OS plus dev environment being reused so why use layers? When the

> This sounds good as an idea but often does not pan out, usually its just the base OS or base OS plus dev environment being reused so why use layers? When the build process is predictable or plannable in advance, this can turn out well. I'm familiar with buildpacks in this respect -- the basic order of operations and layout of the filesystem is the same for all software that passed through a buildpack. > And If there are updates to any of the lower layers for instance security or version updates usually the container needs to be rebuilt so again you are not benefiting from using layers to build containers. Layer rebasing will change this pretty dramatically. From "I need to rebuild and roll all my apps" to rebasing the image on new layers in seconds and rolling them out across a fleet in seconds to minutes.