And unlike setup & management tools, it appears that we have a clear "winner" for K8s app management: helm. And there's more overlap than you'd expect. For instance I recently typed "helm install prometheus" and not only did it install prometheus but it installed it with all the hooks necessary to monitor the K8s cluster.
I'm not sure why I can't do the same to get an elasticsearch, logstash & kibana stack (or similar competing stack) set up as a cluster logging solution. AFAICT right now you have to have the right flags set on your kubelet startup script to do this, but that's the sort of thing that I hope & believe that K8s is making better.
And setting up a glusterfs cluster to use as a storage provider also did a surprising amount of its setup in k8s.
Obviously K8s setup can't quite be reduced to a simple `apt-get install kubelet`, but hopefully eventually it isn't much more.