There's no question that drugs have left most in a downward destructive spiral that's been too difficult for many to overcome. It's a shame the talent the world has lost. However, I will say that I think that there's some who've creatively benefited from being slightly out of their gourd, regardless of how it may have effected ability. Youth, frustration, angst... can't beat 'em for some of the best stuff... until the suits start meddling, and that NEVER seems to feed the muse. Not many have proven strong enough to corral all the beasts that suddenly appear with success...but there does appear to be a sweet spot that's hit just before everything comes down on them, or sobriety, for some...and I'm still not sure if it's a product of the process, or if the drugs add fuel to the creative spark.