It's the kind of thing that was a really killer way of bringing a half dozen open technologies into one easy-to-use tool, and despite the general simplicity of

It's the kind of thing that was a really killer way of bringing a half dozen open technologies into one easy-to-use tool, and despite the general simplicity of it, there wasn't much reason for quite a while to try to build anything better. Not that it wouldn't have been pretty easy to do, but if you did, most people would have said "but why?" And now Docker, Inc. has gone on to answer the "why" for us.