Definitely Nicko. The guy's in his sixties --how long is he going to be able to keep touring? Everyone in Maiden could keep doing studio albums for a long, long while yet, but I just don't think it's what many of them really want to do i.e. just studio, with no touring. Touring seems very important to them. If anyone can't do it, or isn't enjoying it any more (& makes it known), then I fear it's all over.
 
Quite interesting to hear how musically motivated Harris still is though; very encouraging. Adrian (& Bruce), with their solo work (or mention of), still seem pretty motivated too. Dave wouldn't quit, I don't think. He'll stick it out to the end. And, no sign of Janick being particularly disinterested or incapable either. So, all-in-all, I think this is quite encouraging, & nothing to be particularly concerned about, in respect to Maiden.