Spot on. Once an image has been built its safe to say that it can be moved around and ran even after a lot of time has passed. The build process is another stor

Spot on. Once an image has been built its safe to say that it can be moved around and ran even after a lot of time has passed. The build process is another story; even though you have the steps(the logic) for creating the image(the result), you still need to control the package sources(the input data) to get an image that works correctly. I think the build process maintains its "run anywhere" property, but it doesn't maintain its "run anytime" property.