Buy a Synology DiskStation, and you get an easy-to-use yet customisable OS, that receives security updates for up to a decade.
Also comes with checksums/data scrubbing (btrfs; like zfs), Docker support, snapshots, E2E diff-based backups to your choice of cloud provider, an optional cloud-based NAT-puncher if you don't like/know to set up port forwarding, etc.
Sure, the hardware has a markup, but you're paying for a nearly-Apple-like experience that's still crazily customisable. I've had zero complaints.