Comment by HackerThemAll
2 hours ago
Docker is a concept resembling FreeBSD's jails that were introduced in year 2000, having much better isolation, much better security than Docker has had for a long time (perhaps even now jails are still superior to Docker).
Better isolation, better security, but far fewer gists and shared config-files shared ok the Internet for common tasks. Docker comprehensively wkn thr popularity contest, and is often the more convenient solution because of it, in a worse is better way.