Kubernetes may eventually underpin lots of higher level infrastructure, but most stuff currently isn't running atop Kubernetes. None of the higher level contain

Kubernetes may eventually underpin lots of higher level infrastructure, but most stuff currently isn't running atop Kubernetes. None of the higher level container-as-a-service offerings by the major cloud providers run on Kubernetes, for example. Nor does Heroku. And moreover a lot of people are still working with lower-level abstractions (VMs and auto-scaling groups) or no abstractions at all (pet servers).