I don’t know if managed clusters is actually a savings unless you really need the elasticity. Usually managed solutions are 2 or 10x the cost of dedicated servers or on prem, respectively.
Sorry, I was talking about managed database, lambda, S3. I agree that managed Kubernetes is to expensive. Unless you have a very specific workload, it honestly doesn’t make sense. Depending on your usecase building on cloud service and auto-scaling VMs is going to be much cheaper.