Docker didn't bring container running features or kernel features for running containers (they just used LXC at first didn't they?), Docker brought an image lay

Docker didn't bring container running features or kernel features for running containers (they just used LXC at first didn't they?), Docker brought an image layering and distribution set of features for single process containers. OpenVZ (like LXC) was more of an OS level VM alternative type of container. Docker was more of a developer oriented distribution/isolation system than OpenVZ/LXC/etc which were more of a sysadmin oriented hosting system. In the very early days Docker didn't make much sense to me until I realised that.