I think the premise of this article is misleading. It's true that creating a storage subsystem in Kubernetes is exceedingly difficult, however using Kubernetes

I think the premise of this article is misleading. It's true that creating a storage subsystem in Kubernetes is exceedingly difficult, however using Kubernetes for stateful applications isn't any more difficult than using instances with persistent disk in any cloud provider. For applications deployed in cloud infrastructure, most folks are using persistent disk simply for the ease of management. Some folks end up going to local disk for scale and performance reasons, at which point they end up having exactly the same problem one would have trying to do the same with Kubernetes.