Roon is definitely a pricey proposition versus utilizing native Connect methods that Tidal and Spotify use - if you have a compatible streamer. Quboz doesn’t offer a Connect feature that bypasses Bluetooth and allows you to stay in the app, and because of this, I feel like Roon really shines if using this particular streaming service. The big piece for me is that Roon allows you to tag albums and playlists which helps filtering by genre or mood (that you created). Worth it - meh, probably not, but I definitely try to utilize on the daily to justify the lifetime purchase prior to the increase.
OP - if you have both Tidal and Quboz, the one benefit is that you could create playlist that include tracks from both services. Roon would also allow you to merge all of your albums in one place under Roon