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.
I’m using Unraid, which is built on top of Slackware. It has a very nice Docker web UI for apps like Jellyfin. It’s not immutable though. I don’t know of any NAS-specific OSes that are immutable.