On a fresh cluster, install OpenShift Serverless and immediately create a KnativeServing instance using the UI in the openshift-operators namespace it drops you into. When I did this, it ended up actually deploying a full Knative Serving control plane in my openshift-operators namespace instead of preventing me or telling me this should only be in the knative-serving namespace.

We should never allow the user to get a working Knative Serving control plane in a namespace other than `knative-serving` until/unless we later decide to change or relax that restriction.