> Several qualities of Kubernetes stood out from the other platforms we evaluated: the vibrant open source community supporting the project, the first run experience (which allowed us to deploy a small cluster and an application in the first few hours of our initial experiment), and a wealth of information available about the experience that motivated its design.

It's interesting that the reasons they cite for choosing Kubernetes over alternatives are entirely driven by 'developer experience' and not at all technical. It shows how critical community development, good documentation, and marketing are to building a successful open source project.