Given the already crowded nature of FM in the U.S., would it be possible for a migration, a la Canada or Mexico, of AMs to FMs? Even a 75% migration, or 50%? Seems as though the FM band is too crowded already.
Has the FCC or any industry group done a computer modeling of this question?
My "off the top of my head" guess is that the people who could afford to staff or fund such a study have no interest in finding a solution that is equitable to "small potatoes" operators and communties. The financially stable organizations simply hire a consulting firm to find themselves the best possible moves and changes. Everyone else can do their own thing.
When I travel across country to visit my ancestral home or visit my children in another state, I observe a number of stations and markets that have a hard time just staying alive... much less have the time, energy and funding to play "high-tech what-if". The easy answer is: Darwin at work.
If they are to small, too weak, too dumb to find their own improvement in the spectrum, they deserve to become extinct.
The more profound observation is: I'm not worried about the loser who owns the station with the unpainted building with the gravel parking lot. I am concerned that the regulatory system look after the people, the listeners that live in that geography.
If their station owner won't do, can't do the right thing.... the SYSTEM should do the right thing