but that does not ultimately pay the bills if no one is listening.
And that's what is going to ultimately kill it.
AM antennas require a lot of land.
AM transmitters require a lot of power.
Listeners don't want a ton of commercials.
DJ's don't work for free.
Where AM works is where it's the only -free- option. Wide open expanses of the western USA where FM requires a lot of high mountains/towers to reach a big enough customer base to pay the bills.
Satellite is effective, but it's difficult to get local programming and news. Satellite also has challenges in the mountains.
Would be interesting to see what would happen with the AM broadcast band if the market dried up. The spectrum isn't very useable for much else. Not much demand for it. AM receivers won't go away. Maybe it'll find a life under some different model.
I've got a little 1KW am station with an inefficient antenna about 50 miles from me. Comes in scratchy during the day, and not at all at night. Local programming. Network news with local news tacked on at the end. In the summers, they often air local little league games. Music isn't networked, but it really sounds like a hard drive with about a 100 songs in it. At a 1000 watts and a small antenna, they are doing pretty well. Primarily aimed at the agriculture listener with the news reports/weather/going rates for produce talked about in the early mornings. Maybe the saving grace for AM will be these small stations.