Proxmox uses LXC for containers and KVM for virtualization. TrueNAS SCALE (now) uses LXC for containers and KVM for virtualization. Is there any use-case left where it still makes sense to run SCALE inside of Proxmox, or is it just as good/peformant to have SCALE handle both NAS duties as well as the other things I would normally run in containers and VMs?

Could I, for example, set up a container/VM that needs especially quick I/O or a very fast single-thread CPU process in SCALE and expect the results to be about as good as they would have been in Proxmox, or is there more to it?