

If you’re familiar with Linux, I highly recommend it. The flexibility is just great and you can setup whatever dashboards / management tools you need. No need to tie yourself to a specific solution IMHO.
If you’re going with Docker containers, a lot of the NAS OSes just hold you back because they don’t support all the options that Docker offers. You’ll be fighting the system if you need to do any advanced Docker configuration.
I used to do that. I had a QNAP NAS and a small Intel NUC running Arch that would host all my services. I would just mount the NAS folders via Samba into the NUC. Problem is that services can’t watch the filesystem for changes. If I add a video to my Jellyfin directory, Jellyfin won’t automatically initiate a scan.
Nowadays, I just combine them into one. Just seems simpler that way.