PV Access mode on allow ReadWriteOnce

Trying to do simple thing on managed kubernetes service, I ran into a strange issue, check the doc and found:

> Our storage resource, Cinder, doesn’t allow to mount a PV on several nodes at the same time, so you need to use the ReadWriteOnce access mode.

So, for every deployment with persistent volume, we can say goodbye to:
- Rolling update
- Scalling

It's a HUGE limitation ! Don't you plan to have another provisioner like Ceph ?