I left behind TrueNAS (as a primary storage) and went all hyperconverged on proxmox. Only hiccups were NFS sharing (ironed that out to my k8s nodes, etc.) and then using sanoid/syncoid to take snapshots. That and setting up TrueNAS SCALE as a backup server to pull snapshots from proxmox (just had to get the naming scheme right.)
Again, these weren’t insurmountable and I have no regrets about going all in on just proxmox. I’ve replaced a couple drives in it without issue as well. TrueNAS is great for just storage but it is very, very lacking in doing just about anything else IMO but hey- that is its primary goal so can’t really complain.