The use cases for radio have largely been overtaken by other methods of media distribution.
If you listen :for the music: then as you mention, there is not much music left of radio.
if you listen :for the news: then there are far better options.
At some point, radio wasn't about content, but being able to hear something human in a remote location; it was a sense of connectedness. I think you are speaking to this in your 4am example. Well, this use case may still exist, but it is harder to find yourself in remote locations, and less of us accessing them.