I think sometimes people also confuse "easiness" and "managed complexity". Docker makes it easy to work on a single container/image at a time, so you don't have

I think sometimes people also confuse "easiness" and "managed complexity". Docker makes it easy to work on a single container/image at a time, so you don't have to simultaneously grasp the rest of a complex system. Complexity management is not a Docker-specific thing, but Docker makes it easier than before, and standardizes how it's done. I think that's the main added value.