I’m assuming you are saying that if Roon and Spotify were integrated that Roon’s Radio function would be able to pull from Spotify’s database. My opinion is this will never happen. Spotify only supports Spotify Connect which streams from their app to compatible endpoints. No database dump to Roon to merge into the Roon master database which drives Roon Radio.
Seems like Danny just answered this.
Again, something that won’t happen in my opinion. No deep database integration would mean the end of much of Roon’s functionality.
Tim