> (...) they always miss one of the most critical parts of the Docker ecosystem - the easily hackable and extensible container image format. Exactly this. Doc

> (...) they always miss one of the most critical parts of the Docker ecosystem - the easily hackable and extensible container image format. Exactly this. Docker might have a ton of nifty features, but it's killer feature is undoubtedly app packaging and deploying. Features like chroot are already as old as time, but they never became nearly as popular as Docker for a good reason: they don't solve the problem most people need to get out of the way before being able to containerize apps.