According to several posters here on this thread, seems there’s "ROON for IMPROVEMENT" in its sound quality. I have not yet tried ROON, but I have good digital equipment to run it on: A MELCO Network Switch, their Model S100, for Audio Streaming (it is connected between my xfinity Comcast Cable Internet Modem and my MELCO N1 A EX High-Res Digital Music Library). The Melco N1 A EX music library is, in turn, connected to my Holo Audio MAY KTE DAC via USB. I’m using an iPad to control the MELCO LIBRARY, which incidentally DOES have provision for running ROON on it.
So, perhaps the quality of Internet Connection you have (mine is Comcast High-Speed) as well as the equipment you run ROON on may be the determining factor in Roon’s sound quality. With my present setup, I access Qobuz and Tidal directly, using my iPad, and the Melco streams it to my DAC. I am tempted to subscribe to Roon’s services, for its convenience - but I certainly don’t want the sound quality of my system to be degraded by Roon, if in fact that is a problem.