Technology education is a constant process, especially with listeners.
I am a big fan of HD Radio. Where others see a glass half-empty (i.e. limited audience, cost barriers and so forth), I see opportunities. FM radio must be more competitive in a variety of areas, especially the digital space. We may not have what Spotify or Beats 1 has, but we do have options. In addition, the web is leveling out the terrain and making media more available.
This short piece reflects on that matter and does a little teaching for listeners of KPFT, for which I work as program director. You can read it here.