FreeNAS on Proxmox. What's the current state of play?

I'm in the early stages of planning my next FreeNAS server build and I'm strongly leaning toward going the virtualization route (using an ASRock X470D4U with an M1015 and possibly a PCIe Intel quad port NIC passed through to the FreeNAS VM). My goal is to replace my current main "X10" server (see sig), which in turn would become my secondary backup server. The plan is that in the event that something happens to the new "X470" server, I should be able to just move the disks back to my X10...

FreeNAS on Proxmox. What's the current state of play?