Good post.

The people on the train that travel 30 min or more each way for work.

The people on the expressway in gridlock all day.

The people that really like someone they can no longer listen to on terrestrial radio.

The people that belong to some way of life, living, a certain sector politically for example, will follow a podcast.

The people that have short attention spans.

The people that do not like commercials, but do not realize there are subliminal or not so subliminal advertisements in the podcasts.

While podcasts can be popular standalone, they majority do not work on a terrestrial station. Most podcasters can't afford to pay to have their podcast aired. To be honest..... why limit yourself to a terrestrial signal when you can be heard worldwide?

Z