Kubernetes, in the form of k3s, was a critical success factor for us with the onprem deployment of our SaaS product.

What's the problem with a single-node cluster? We use that for e.g. dev environments, as well as some small onprem deployments.

> Even when cloud deployed, K8s mostly functions as a batteries-not-included wrapper around the underlying cloud provider services and APIs.

Which batteries are not included? The "wrapper around the underlying cloud provider services and APIs" is enormously important. Why would you prefer to use a less well-designed, more vendor-specific set of APIs?

I seriously don't get these criticisms of k8s. K8s abstracts away, and standardizes, an enormous amount of system complexity. The people who object to it just don't have the requirements where it starts making sense, that's all.