> radio for discovery
was a big question mark I had as well. The Clear Channel and iHeart stations are not known for discovery. Now if you find a college station or by some miracle an independent station you can get some new stuff. My favorite local college station is also ad free. They also have an app which I lean on as it's not the strongest transmitter so their coverage is spotty. Maybe there's other indy stations with apps as well??
Public radio is great, NPR and the member stations have some great streaming channels. KEXP and KCRW are two favs
This radio station is local to the city I live in, and they've been great for music discovery for me, although heavy focus on local artists, but they've put me onto a few international artists as well.
https://threedradio.com/
I subscribe to them, have done so for ~10 years I reckon. I don't listen as much as I used to, but I want them to continue existing either way.
Be aware, the quality of their playlists is incredibly variable, but that's part of the charm. I guarantee you'll hear something you haven't heard before... for better or worse.
Example: https://www.youtube.com/watch?v=6zHR0HMFY60 (with 2 minutes of silence at the start to, presumably, avoid auto-copyright claims).