However, lets be fair to the Roon team: If Qobuz or any other service doesn’t want to integrate with Roon because they have delusions of grandeur, then there’s little the Roon team can do.
I don’t know the details required for a proper Roon integration like TIDAL’s but I presume it is more than what the API (the connectivity method that is used in Audirvana et al) can provide.
The Spotify case is interesting: They have effectively abolished all integrations across the board (eg the early Sonos implementation) in favor of Spotify Connect. This is frankly brilliant in the Spotify case because a great deal of their business model is to collect deep information on what you listen to, what you search, what you click on even if you don’t play it, what you skip over, etc etc. I am pretty sure they will never integrate with Roon, unfortunately.