David Gellis: Patagonia's announcement is surprising, but not out of keeping with all the signals they've been giving for a half century now. He writes that Generational succession is a risky continuity plan for any business and it does little to assure that the company's values will remain intact into the far future. "It brings a sense of relief for Patagonia, my family," he says. 'I'm also just happy to stop talking about death and get back to work'