Great thread OP!!!
Do you listen to vinyl or CD? Well, even if you don't, I do like Discogs for research. I like to look at granular facts about an album, like where it was recorded, record label, release data, who mastered it and so on. Discogs lets you link right to other albums, for example, that might be mastered by the same people.
I use Roon with Qobuz in the background. It is better than Tidal, Qobuz or Spotify on their own because it lets you get more information about the music.
I highly recommend playing with the features in Discogs.