They are orchestration systems for clusters, and Gravitational offers tooling to aggregate thousands of them (owned by 3rd parties) to simplify operations. ...

They are orchestration systems for clusters, and Gravitational offers tooling to aggregate thousands of them (owned by 3rd parties) to simplify operations. ...except we decided against using these PaaSes and placed a bet on Kubernetes. In fact, our belief is that developers should think less about orchestration and let other people do the work. Kubernetes offers a perfect set of abstractions to make this thinking practical.