If you like Roon - be happy with it. It’s clearly the best user experience. Just also know there might be better sound available. The good thing is - you can actually have both. Use Roon for everyday and keep Lighting DS (or whatever proprietary system you’re on) for critical listening. It’s no problem to have both.
The above is really good advice. I am leaning toward keeping my Mojo Audio DejaVu (server/streamer/NAS) and using it as a networked server/NAS running roon core and allowing me to use different roon endpoints for different systems. If I were able to set things up to have a choice of playing roon or playing the streamers own proprietary player software you are absolutely correct that it would be the best of both worlds. I still like what I have read about the Auralic Aries G2.2 over similar competitors for several reasons including the quiet power supply, ability for onboard file storage (if I decide to give up roon), well-regarded proprietary software player (Lightening DS), and multiple outputs including a high performance USB output but also coax and AES/EBU. I just haven't heard much feedback from users about how it sounds, other than a couple of very positive reviews by the-ear and positive-feedback.