No, it wasn't because the building is the ugliest one ever built, nor because there is ice underneath the floor.
Not because they are simply coasting on the glory of a decade ago.
Not because they should no longer be calling themselves Guns n' Roses since Axl is the only original remaining member of the band (and what is GNR without Slash, folks? Nuthin, that's what.)
It was because they couldn't drink onstage.
The first step, Axl, is admitting there's a problem. Seriously. Dozens of GNR fans were weeping.
PS: I heart GNR. I showed my boobs to Axl Rose once at a show (I was fifteen) and Appetite for Destruction is a fantastic album. But now I'm getting a little embarrassed for them (and not because they saw my bare chest).