Author here. In the last part of my post, I do mention that Dockerfiles are probably the one thing that will outlast everything else from Docker. There's nothing really practical to replace that artifact at this time if you ask me.

There are some tools to convert your docker-compose into the k8s resource model. I'd advise against switching local development to Kubernetes. Docker found a sweet spot there, as heavyweight as it is today. I think where we'll land is Dockerfile + one of the other alternatives like kaniko, buildah, etc.