

On the contrary, HAM and CB radios have been popular since WWII (and somewhat before). I have a radio capable of picking up shortwave frequencies… holy shit the stuff you still hear on there.
Given that today you also need an Internet connection I’m not sure the barrier of microphone and smart device is all that different from microphone and HAM receiver.

There was definitely an overlap between Art Bell listeners and Rush Limbaugh listeners but one didn’t necessarily lead to the other.