One more thing, the creation of 'Classic Hits' over the past 10 years or so has reduced a lot of that variety in classic rock. Classic rock is going out of it's way to distinguish itself from classic hits so it's rare a classic rock station will play stuff like Alan Parson's Project, Steely Dan and many of the woodstock artist excluding Hendrix of course.
AAA and Alternative formats kill each other as well because they force each other to remove certain songs from their playlist in attempt to sound apart. I guess commercial alternative is the same way with commercial active rock. Today, most (not all) alternative stations will not touch harder industrial rock like Nine Inch Nails. Active Rock tends to focus more on those artist. Same with Tool; Hell, first time i ever heard of Tool was on Alternative 99X in atlanta. If Tool came out with a new song tomorrow, it may get some airplay on alternative but active rock will own it. Not that Tool can't be considered alternative but Active and Alternative go at lengths to not override each other which kills variety in my opinion.
AAA and Alternative formats kill each other as well because they force each other to remove certain songs from their playlist in attempt to sound apart. I guess commercial alternative is the same way with commercial active rock. Today, most (not all) alternative stations will not touch harder industrial rock like Nine Inch Nails. Active Rock tends to focus more on those artist. Same with Tool; Hell, first time i ever heard of Tool was on Alternative 99X in atlanta. If Tool came out with a new song tomorrow, it may get some airplay on alternative but active rock will own it. Not that Tool can't be considered alternative but Active and Alternative go at lengths to not override each other which kills variety in my opinion.