Ubuntu
Ubuntu provides an ideal foundation for a do-it-yourself NAS setup. Ubuntu LTS can run securely with low maintenance for many years. Ubuntu 20.04 will receive security updates via ESM until April 2030. ESM is available free for personal use or for a nominal fee for commerical use. Ubuntu also has kernel Livepatch Service to address security issues without reboots, also free for personal use.
BlockCaptain NAS
The BlockCaptain NAS Media Creator can be used to seed a Ubuntu-based NAS. The media can be pre-configured to fully install a system with no user interaction.
ZSys
In the future, when there is ZFS support, BlockCaptain will complement ZSys.
LXD
LXD on Ubuntu a good complement to application (OCI/Docker) containers. LXD runs system (LXD) containers and full virtual machines (QEMU).
TODO backing up with blkcapt.