I wouldn’t build a NAS in one of these unless it’s like an older server or something. Mainly because these machines aren’t meant for always on use and usually won’t handle very well under random IO of something like ZFS. But if it’s something like a one off Linx box or seed box like you said where you don’t really care if it dies, that would be good. I know a lot of people in this sub also run a handful of these office machines for a Proxmox cluster or something like that where if one craps out, the others could take over