We're already over 20 years into it. So consider it's around 1962 for FM. In a few years, the patent runs out, and it becomes shareware. That's when its use will grow.
The situation wth radio today is completely different than it was during the rise of FM in the 1960’s.
Most factory car stereos from the past 20 years have an auxiliary input that provide smartphone audio output with an acceptable sound quality. This means that anyone with a smartphone and a cheap data plan has access to 50,000 radio stations of any genre imaginable. If that’s not enough, many people choose to pay an extra $10/month to listen to any song ever recorded and customize their playlists in an experience that’s free of commercials and DJ-chatter. Some people choose not to pay for Spotify, but I don’t know of one person that doesn’t know how to stream music on a phone. However, I can count on one hand the number people that have even heard of HD Radio.
When have you ever heard of a “must have” programming that’s only available on HD Radio? Any HD2 station that’s worth listening to will probably have an analogue translator rebroadcasting its signal. If not, the station will probably be available as an Internet stream. Satellite radio has Howard Stern to draw listeners to the service. What compelling content does HD Radio have in any market?
I recently replaced the factory radio in my car with a Sony double-din multimedia radio that supports Apple CarPlay. I could have purchased the Sony model that supports HD, but that would have cost me an additional $150. I couldn’t find a reason to listen to HD when so many options are available from my phone.
Here in Vancouver, we’re serviced by 6 HD radio stations (4 in Vancouver and 2 from Washington State). None of the HD sub-channels on these stations broadcast any original programming. Instead, these stations use the technology to rebroadcast their AM sister stations on FM. It’s more of a convenience factor so people don’t have to switch bands between AM and FM.
I was a big proponent of HD Radio when I tried it in 2006. I was amazed by how a public radio station was broadcasting multiple feeds of news, local music, and the BBC World Service all from one signal. I imagined what it would be like to have triple the number of radio stations with diverse content for free. Unfortunately, it was poorly executed from the beginning and consumers graduated from iPods to smartphones shortly after. As an earlier post mentioned, it’s been over 10 and we’re still waiting for it to catch on.