That's not true. GCE uses Borg very differently than normal Google internal systems, which you can imagine is quite natural as they are reserving different customers. GCS and other system, in turn, also differ wildly than GCE. when you talk about GCP as a whole, it becomes impossible to summarize in a few statement, and I doubt there is anyone on earth who is capable to describe it coherently even without time constraint.

What I said (GCP runs on Borg) is absolutely and technically correct, affirmed by your own comment, which highlights the power and flexibility of Borg. The point being no one[1] at Google relies on Kubernetes for raw cluster management capabilities at scale. They might use it for other things that can make deployment more friendly in some scenarios. (This doesn’t make Kubernetes a bad system by any means, just quite different and not a substitute for Borg whereas gRPC is a direct substitute for Stubby). This debate is better argued in your own eng-misc@ and not on a public forum.

[1]: no-one that we care. At Google this is obviously always incorrect. There’s always that someone who uses weird things like mongoDB and AWS.