I made 2 Raspberry Pi5 NAS's. one with 4x 6TB and one with 4x 12TB.

Used mergerfs and snapraid, and a simple NFS share. Absolutely perfect for Proxmox backups, our pictures, media, etc, etc. No fuss, easy replacement of drives without needing to keep drives of the same size around.

I'm good with ZFS, have been for years now managing storage for $COMPANY. And I still freaking love using zfs send/receive with proxmox ;-)

But for most at home stuff: mergerfs and snapraid are just more logical.