Roon suggests different artists based on what one is listening to and the radio feature plays tracks based in the sound profiles you like. I use Qobuz so my discoveries are almost unlimited. Unfortunately Roon is subject to problems and becomes a “self help” paid for service. If you are a network engineer or love digging through their forum for answers more power to you.
i just want to play and discover music. Roon has been down for me over a week and after posting my issue (more like their issue that’s affecting me) I got 1 reply from Roon and after posting almost immediately my reply no further help has been given !!!