Edit2: OK Per feedback I am going to have a dedicated external NAS and a separate homeserver. The NAS will probably run TrueNAS. The homeserver will use an immutable os like fedora silverblue. I am doing a dedicated NAS because it can be good at doing one thing - serving files and making backups. Then my homeserver can be good at doing whatever I want it to do without accidentally torching my data.
I haven’t found any good information on which distro to use for the NAS I am building. Sure, there are a few out there. But as far as I can tell, none are immutable and that seems to be the new thing for long term durability.
Edit: One requirement is it will run a media server with hardware transcoding. I’m not quite sure if I can containerize jellyfin and still easily hardware transcode without a more expensive processor that supports hyper-v.
Typically on a home server you would virtualize services anyway so it really doesn’t matter what distro is running on the metal.
And also if you’re fully virtualized you can switch out the host distro anytime you want, so you can adopt an immutable one later if you want.
Why do you want an immutable distro anyway?
I want immutability because I come from a the debian world where everything just works. But I want the benefits of using modern versions of packages.