Rember the predicted death of Medium Wave.
What do you think revivied it to it's current robust state?

I think it was CONTENT!

Do you remember some of the technological "advancements" the
industry tried to institute in order to "compete" with VHF FM BCB?
(AM Stereo for one).

To broaden your listener ship, you need CONTENT.
Something people want, but can't get easily elsewhere.
------------------------------------------------

Here is a thought: In 10 years HF BCB could be the terrestile equivalent of
sattelite radio via DRM. (is that good or bad?) In my mind it is only bad
if content is limited.