I think it depends on why you are attending the concert. I don't attend as many as I did in my teens, but back then it was more about community than music. In hindsight, the music those bands played wasn't particularly good. The real draw was getting together with a bunch of like minded people and just "having a good time." That often included singing, dancing, and generally not paying attention to what happened on the stage. If you truly want to enjoy the music, odds are that it can be done easier and cheaper from the comfort of your own home. The same applies for most other live events, whether they be WWDC sessions or sporting events.