If anything happened in 2016 in the containerization space, it was that Docker was playing a lot of catch-up to Kubernetes. It seems like they rushed out things and then they botched the OSX native release of Docker in Q2 2016, and lost a lot of goodwill in the community of individual developers (more so than CoreOS did with rkt? That's how it feels like to me. Back then, people thought CoreOS were the assholes for forking. I think that sentiment has shifted). I have not tracked how Docker is doing in enterprise, but I guess they are doing well?
I kinda doubt Docker (specifically, Docker Swarm, and the orchestration tools Docker forced into docker-engine) will ever catch up to Kubernetes, but hey, things move fast, right?
Having said all of that, I like this description: https://news.ycombinator.com/item?id=14141832 ... which makes _much_ more sense. Maybe now, someone will use Moby to create a native OSX Docker kit that actually has decent file sync performance (either with unisonfs, rsync, or nfs, and not try to layer it as another FS).