Agreed, an average home NAS has two HDDs in RAID1. One drive faiks, it gets replacee. Synology allows to use Btrfs, other stuff leans towards ZFS, though Ext4FS

Agreed, an average home NAS has two HDDs in RAID1. One drive faiks, it gets replacee. Synology allows to use Btrfs, other stuff leans towards ZFS, though Ext4FS would suffice (without features like snapshotting). However I use a a Turing Pi 2 with 3x CM4 and 1x Jetson Nano. The Nano can utilize both NVMe and SATA while the CM4s cannot utilize NCMe. I'm using a MiniPCI to SATA converter for SATA. You could use a MiniPCI to NVMe converter though. I have not set it up yet (I already have a working NAS and offsite backup NAS) but for the data you can use smaller SATA drives together with say Ceph or Longhorn. Although the price (minus decked out RAM versions) for CM4s has settled as availability has been fixed, and the RK1 for Turing Pi 2 is also out, I would still welcome competition for CM4 and ARM64 in general.