> SF is only available from one vendor, whereas K8S is available almost anywhere.

SF is open source on GitHub and you can run it on-premise or on any cloud, Windows or Linux.

The tooling is probably easier on Azure; but you can also happily run it on AWS; as well as the Service Mesh variant which is sort of "Serverless Clusters" or "Clusterless Clusters", applying the strange naming of "Serverless".