I have a proxmox host with a privileged lxc container offering samba and nfs shares. Drives are pooled as a btrfs RAID 1 (lets me use different sized drives easily).

I tried OMV etc. but found all of those options to be not really convenient once you start directly modifying config files. I love the convenience those offer but for something like NAS , less moving parts mean less breakage in my experience.

I use raid 1 for actual data but no raid for movies and media that is disposable (not photos etc.). Didn't find raid worthwhile in that scenario after having tried it. Might be because I didn't have enough $$ to truly spend on it.