I'm using Proxmox 6 on an auction Hetzner server (48gb, 2x3Tb HDD... very cheap). I really like that everything is on ZFS (without hacks, Proxmox supports installation with / on ZFS), and it provides ...
The differences aren't as big as they seem ...
I have a Proxmox 6 host that has a ZFS mirror consisting of 2 NVME drives and 4 spinners in a "raid10-like" ZFS configuration (a stripe of 2 mirrors) It has 1 Linux server VM acting as an iSCSI target ...