I have never been a Roon user. I have seen it used. It appears to help organize large collections and also suggest new music based on listening algorithms. It also provides liner notes type information on the recordings.
That was exciting stuff but as with all digital technology it is only a few years before the competition emulates it. Particularly if one is using a streaming service, the service software has similar functionality. Roon may still have a niche organizing and integrating a hard drive with music along with the music pulled from the streaming service, so it all resides in one place. Personally I’m ok with having those files in 2 areas, but I understand the appeal.
I can’t address the SQ issue from experience but I have seen enough written about potential SQ degradation with Roon that it discouraged me from ever becoming a user.

