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