You're absolutely right. I was focused on the subset of kub-based platforms which are container-focused and are overlapping more and more with Docker. But you'

You're absolutely right. I was focused on the subset of kub-based platforms which are container-focused and are overlapping more and more with Docker. But you're right, kub itself is a neatly generic orchestration component which can be used with non-container things. That is an excellent reason for decoupling the underlying container runtime.