I like it for quickly spawning up fresh places to test during development, or for a fresh environment since so many package managers gems, bundler, npm, etc fuck themselves up and install conflicting packages.

So I find this article to be the same as the hype around Docker, useful information surrounded by hyperbole that ruins it?

I don't need a full VM usually, and being just local dev the security isn't an issue, but used Vagrant before Docker for this.

Is there anything else similar?