Launching a billion-dollar business or rising to the top of the C-suite requires making some sacrifices, and oftentimes, downtime can be in short supply. CEOs are divided on how they feel about work-life balance, but many seem to take issue with the concept itself—and Amazon founder Jeff Bezos is set on redefining the notion on his own terms. “I don’t love the word ‘balance’ because it implies a tradeoff,” Bezos said recently at Italian Tech Week. “I’ve often had people ask me, ‘How do you deal with work- ...