I'm not the original poster, but I think they were suggesting that K8s supports ...

I'm not the original poster, but I think they were suggesting that K8s supports better bin packing than you get with virtual machines, so you can run the same applications on fewer (or smaller) servers.

In terms of the cutting edge of bringing "declarative, Kubernetes-style APIs to cluster creation, configuration, and management" see https://github.com/kubernetes-sigs/cluster-api