This is what I'm working on, although it is built on top of Kubernetes! We feel Kube suffers from a disconnect between the insane complexity requirements of enterprise deployments and what most coders and businesses actually need - which is exactly what you said: a consistent Heroku-ish experience on their own hardware or whatever cloud is convenient. Kube needs what Git needed - a GitHub. Feel free to reach out to me (email in profile), I'd be happy to chat your ear off about it!