ProducerGuy said:
That "10 year" prediction is more like 50 for reasons I've covered before. The bullet point version:
1. People listen in their cars. Internet receivers will have to be standard in cars for at least 20 years (for old cars to be cycled off the road) before AM and FM die.
2. Bandwidth must be available EVERYWHERE like radio. We're not even close to that yet.
3. Network capacity must be able to support enough traffic for bandwidth caps to be lifted.
It takes DECADES for people to change how they consume media. We're closer to the beginning of the wireless Internet revolution than we are to the end of radio.
Radio is not going to die.....BUT, let's take your decade assessment here.
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50 years ago (1962) AM holds strong musically.
40 years ago (1972) AM still strong, FM was "HD" during that time but people take notice.
30 years ago (1982) AM music formats dying off, FM takes over musically. Automakers no longer make AM radio only as standard.
20 years ago (1992) AM mainly spoken word, FM strong, Internet at infancy - dial up modem 28.8k
10 years ago (2002) AM spoken word, FM (post T.A. 1996) still okay, satellite radio, beginning of HD radio, Internet - cable modem/DSL, streaming about 5 years old.
NOW (2012) AM spoken word, FM leaning towards spoken word, Internet - WiFi 4G, online stream quality better. Smartphone apps, tablets, streaming through car stereo via aux port/cassette adapter.
FUTURE
(these are just predictions...mitigating factors can happen)
10 years from now (2022) AM used mainly for brokering & lesser formats. FM leans more spoken word. HD slowly drops broadcasts. WiFi - 5G, streaming car stereos & video services begin/subscribing to bandwidth, satellite radio subscriptions down (once Howard Stern retires). Smaller tablets with more capabilities.
20 years from now (2032) FCC dumps AM & forces the few stations remaining to go HD. FM 80% spoken word except for International and Urban music formats but more people will tune in to streams. WiFi - 7G (yeah, it's going quick!), streaming music/video as standard in autos without dropouts (except for extreme rural areas in the US). Satellite radio dead.
30 years from now (2042). FM dies off (still exists but few listeners), more cars will have streaming stereos than those that don't. WiFi - 10G. FULL coverage of streaming in the US and majority of Canada.
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Having said that, I go 30 on this.

Add to the fact that a generation dies off and newer generations take over, yes, things adjust.