Actually, almost every big company built massive abstractions on top of Kubernetes and it is what Kubernetes is designed to do (and good at).
That's why if you had a chance to look at Dokku and any other "better" self-hosted PaaS offerings, they are dead. Ppl today choose to use Kubernetes to build abstractions atop and OAM is a battle tested option to achieve this with better clarity and interpretability. Many companies are shifting away from Cloud Foundry and OpenShift to this approach.
That's why if you had a chance to look at Dokku and any other "better" self-hosted PaaS offerings, they are dead. Ppl today choose to use Kubernetes to build abstractions atop and OAM is a battle tested option to achieve this with better clarity and interpretability. Many companies are shifting away from Cloud Foundry and OpenShift to this approach.