ceph is latency sensitive, but that should only matter for the servers running ceph and not (as much) the clients using it.

I thought quorum feature of proxmox was also latency sensitive, but this is the only thing I found:

https://pve.proxmox.com/wiki/Cluster_Manager#pvecm_cluster_n...

Maybe this doesn't matter if not using HA? I'll read more about it and maybe test it out