I'm an engineer at one of those companies you mentioned who worked directly on the Mesos+DC/OS platform. Mesosphere's support was pretty much nonexistent as fa

I'm an engineer at one of those companies you mentioned who worked directly on the Mesos+DC/OS platform. Mesosphere's support was pretty much nonexistent as far as we were concerned. We had major issues open for years without any significant action. They were never resolved. We had to solve most problems ourselves. We got so fed up that a few of us worked late nights (often up to 2AM) on a bottom-up skunkworks project to replace Mesos with Kubernetes. That project was exceptionally successful. (I'd like to point out that we are not in the Bay area and are adults with families and small children- we hated Mesos so much we were willing to stay up anyway.) In short, Mesos has a lot of great theory but we hated it in practice. Kubernetes has some theoretical flaws but it is better experience for practitioners.