The legit use case for companies like Google/Amazon etc is only to sell it to customers. None of these companies use K8s internally for real critical workloads.
Google uses Kubernetes' grandpa, called Borg, for everything.
But to quote someone: "you are not Google".
I said “something like k8s” above, and Google for sure uses something like k8s called Borg.
Ehm, that is simply not true. Google built it for themselves first. It is essentially the open source version of the internal architecture. It gets used.