...and this was the point I was making earlier, that within genres that have quite [fan-imposed] restrictive defining characteristics, in order to innovate i.e. find new sounds and methods of expression, you have to step outside of the genre, which is where the likes of Black Sabbath, Led Zeppelin, Metallica, Public Enemy, Moby, Dave Gilmour, Cantrell et al come in. However, if you loosen up the restrictions on a genre, then there is much greater room for innovation, and therefore many more examples of musicians who have innovated whilst using the blues as their starting point. The problem here is not the musicians, it's the fans. For the record, I am referring to modern/contemporary blues, so after the ground rules for the blues as we know it today were laid.