This is a "feels" like post, not an expert post. Feels like FM is going to be a classic/retro music format band as current music has moved almost exclusively to streaming services. Much like AM slowly died off when FM took off in the 70s/80s.

Eventually even the classic/retro FM band will die off as well as our age (53) group dies off in the future and go the way of AM. So terrestrial signals might become tall towers of nothing. That what it feels like unless someone can reinvent the wheel and do it well. Just a feeling.