[Dogstar]

No, he never can be replaced, but I'm with the camp that believes three out of the four members should get to play the music they helped create, especially Jerry. He wrote lyrics and music for many of the AIC songs. And William DuVall doesn't try to be Layne. He's got the pipes to sing that stuff, and he's done an excellent job. I saw them 11 times during the last tour and I loved every minute. I may be biased, given that I adore William's other band, Comes With The Fall, but still, if he didn't have the pipes to pull it off, I'd say so.