And with serverless you get significant lock-in, are overpaying for resources, have less ability to debug when things go wrong, have basically zero flexibility

And with serverless you get significant lock-in, are overpaying for resources, have less ability to debug when things go wrong, have basically zero flexibility and it's very difficult to have a local setup mirror your production one. It's fine for certain use cases but you get the benefits of both worlds by just using a managed K8s service like AWS EKS.