Docker is a really complex open source project to build. Feature wise, things need to take into account compatibility with every OS it runs on (linux/windows/bs

Docker is a really complex open source project to build. Feature wise, things need to take into account compatibility with every OS it runs on (linux/windows/bsd), all networking stacks, distributed systems, the actual image distribution project, runC etc. Underdelivered features at that scale is to be expected — quality is a bar that can't be compromised.