Simplification is the key. My setup went from: Custom NAS hardware running vendor-provided OS and heavyweight media serving software -> Custom NAS hardware running TrueNAS + heavyweight media server -> Custom NAS hardware running Linux + NFS -> Old Junker Dell running Linux + NFS. You keep finding bells and whistles you just don't need and all they do is add complexity to your life.
As soon as my Synology dies I'm replacing it with Unifi. I don't want all that extra software with constant CVEs to patch.