After the work You put in fixing
https://xcp-ng.org/forum/topic/12040/restore-only-showing-1-vm/18
It seems like VDI-size in VMs VDIS is back to showing size of snapshot instead of size of VM.
Different use cases: Ceph is better with more hosts (at least 6 or 7 minimum) while XOSTOR is better between 3 to 7/8.
We might have better Ceph support in the future for large clusters.