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Just don't be surprised if a few members show up for the anniversary gig.
"It will definitely have a family reunion feel to it," Finch says.
Then, after the Dallas show, it's more of the same thing the band's been doing for 30 years now: a seemingly endless series of summer festivals.
"I can totally see this thing hitting a fourth decade," Finch says, almost giddily. "Part of this has to be that I don't know where to stop."