If you copy over files directly built by your build steps, sure, you don't really need diffing images, you know where things are. If you're trying to build a mi

If you copy over files directly built by your build steps, sure, you don't really need diffing images, you know where things are. If you're trying to build a minimal image with some specific dependencies copied over that are the result of things you have less control over diffing is pretty much the only way to figure out what you need IME. E.g. you want to copy only the parts of dependencies you actually need.