I’ve previously submitted this as a feature request and I 100% agree that it would be a huge benefit to Roon. I’m sure there’s quite a bit of overlap between Roon and Nugs subscribers, and Nugs has been doing an excellent job recently growing their streaming catalog (still only a fraction of what you can buy through them but still, it’s growing). I stream Nugs all the time when I’m out of the house but don’t listen to them nearly as much at home b/c the whole-house audio is all Roon (and I really don’t want to have to switch to RopieeeXL just for Airplay support for Nugs via Airfoil…that just gets too complicated 
).
https://community.roonlabs.com/t/stream-and-integrate-play-nugs-net/105038