Internet radio is still going strong: https://www.radio-browser.info/

I believe there are! I consistently hear good things about KEXP and FIP but I haven’t listened to either extensively.

I listen to a lot of SomaFM (free, https://somafm.com/) and the Flow State radio-podcast (paid, https://www.flowstate.fm/).

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).

Public radio is great, NPR and the member stations have some great streaming channels. KEXP and KCRW are two favs