> So you’d be attaching a new volume to the running worker VM for each PVC?

That's what we prototyped before local disk was released and before we started disk hot-plug work.

> Could you attach a single large volume, and do path-based provisioning on that?

Possibly. We'd still want disk hot-plug first. Otherwise, customers would have to create their cluster in a certain shape before using PVCs.

Does seem like that could be an issue for RWX PVCs, unless those volumes can be mounted to multiple nodes. Depending on the workload, you might be better off using NFS.