You gotta understand artists are the culprits. You get a huge hit like Rack City and everybody wants to rap on that exact beat. He can't resell it so he remakes it and changes the sound, moves the scale down, and slightly changes the tempo and he gets a check. But what's these lazy ass artists want. Nothing but Mr. me toos. Bet u look in his folder he probably got songs of all types but if your mc Donald's nobody gives a damn about how great your steak is...
Also these A&rs share the blame. They think there artists's album needs to sound exactly like the billboard top 10