Having a humongous kit is, in my opinion, more for showing off than anything else. As veteran metal drummers have matured, many of them have cut down on their kits, and I suppose this rubs off on the up-and-coming youngsters too.
I never understood why some insist on having two bass drums instead of a double pedal. One bass drum is enough hassle to carry around, I'd never even consider having two on my kit.
Of course, that doesn't apply to big artists, as they have plenty of runners and stage hands to deal with that.
