FM radio was pretty much worthless but it was completely different and was practical 52 years ago but it did take a whole sea change in our culture to start FM radio on the way to it's dominance today, underground radio was the mouthpiece for the new culture and luckily they got it almost free and luckily for FM radio they got the hippies free that's what put FM on the road to profitability. Within two years of underground radio putting FM on the map it was highly profitable, IBOC's been here for 15 years and it's still just an unprofitable daydream, it ain't going anywhere and we've known this since it started out 15 years and it's actually using extra electricity so these companies are PAYING to broadcast something that very few people even know exists besides radio geeks, why is it still here, pride, are they just unable to admit that it's been a failure?