Roon’s SQ seemed meh when I was using it, and although Roon is said to be working hard on improving the SQ it is apparently still not yet at the level of the Lumin/Innuos/Aurender/Grimm/Taiko apps, something to do with how demanding it is of system resources exacerbates various noise factors. Manufacturers make their gear Roon ready only because customers demand the best UI experience. Don’t take my word for it, go and read the Grimm and Taiko white papers on the importance and means of optimizing bespoke software for purely audio playback.
And as someone else mentioned, in my experience the Aurender N200 is a fantastic value in case anyone on this thread is looking for a streamer/server solution at that $5K price point.