Ask anyone who has ever played trivia at their local tavern. I say that as someone who once got the only perfect score of 10 for a category about the movie Cool Runnings.
I had tickets to see him before he got sick this year and had to cancel his show... We're hanging onto them, they are supposed to be good if he ends up touring next year after he recovers as he said he plans to.
Yeah, Megadeth was going to open for him too. Now Dave Mustaine has throat cancer, so I don't think there's much chance of seeing them play anytime soon either.
I had a similar experience with Motorhead. They were supposed to be at Carolina Rebellion one year but had to cancel due to Lemmy's health problems. Anthrax played in their place.
I've never had a canceled concert issue. I've seen Weird Al twice he showed up both times. He didn't have any opening act.