The goal is to create relatively low cost NAS' that are still running a full linux distro underneath

Bonus, an easy way to tie it into a cloud offering

Should be fairly hardware agnostic and able to run on cheap low power stuff

https://rockstor.com/ Seems the most promising. Run by an opencollective uses btrfs, for fancy snapshot magic and raid stuff

other contenders:

Custom Linux with cockpit as a web ui

openmediavault

truenas scale

For our “Managed” units probably run rockstor in a hypervisor to allow us to have other workloads