As many as they want. I think one thing that should be obvious about this band is that they don't live down to anyone's expectations. They weren't supposed to have continued success after SWW. They weren't supposed to outlast the 80's. They weren't supposed to be able to sell out stadiums all over the world two decades into their career. Jon wasn't supposed to get critical acclaim as an actor. They are the world champions of outdoing the critical (and often fan's) expectations. No limits.

Becky