NVMe vs NAS vs ?

[The Computer Audiophile]

The only benefit I can see would be quick recognition of newly added local music by Roon. Roon can have issues spotting new files with the music stored on NAS. A manual scan is a workaround. 
 

If you don’t add new files often, this isn’t a big deal. 
 

I’m now running Roon core and the 10TB music library on the same PC and it’s blazing fast.