> Is it, though? I feel like the nuts and bolts of cloud services are super commoditized and I can pick up and leave whenever I want. Kubernetes on Amazon (where I am) is going to be close enough to Kubernetes on GCP

Sure Kubernetes is an open GCP product, but what about datastore, Spanner, Cloud SQL, their memory cache, urlfetch, and a host of other closed source and private services. Kubernetes seems to be the exception to the rule.