Yeah, I replaced a custom resource patching solution with Kustomize. I was very concerned my custom solution would inhibit on-boarding, and wasn't thrilled with Helm. Back in November I was pretty happy when I stumbled across Kustomize, it claimed to do exactly what I wanted it to do. In reality there were a few hiccups, but it's certainly moving in the right direction.

Granted, I still do have a bunch of "opinionated" scripts, but they delegate the heavy lifting to Kustomize, and all the configuration itself is just stock-standard k8s resources.