From UX perspective, 'default' is a bad name for the default storage class:
$ kubectl get storageclass
NAME TYPE
default (default) kubernetes.io/aws-ebs
This is sort of OK, it gets more confusing when user is not happy with the
preinstalled default storage class and creates its own and makes it default:
NAME TYPE
default kubernetes.io/aws-ebs
iops (default) kubernetes.io/aws-ebs