Amazing sound!
But can they write their own, original music?
I'm sure they can, but as Zoso (a popular Led Zeppelin tribute I see frequently) said, "Ya gotta pay the bills." You see, all these guys want to play a certain *type* of music but that type is no longer popular enough to sustain a living so they play covers which is (mostly for nostalgic old-timers who generally aren't interested in discovering original music...people like me
).
I watched a well done documentary on Zoso and they would much rather play their own music, but people won't come out to hear it.