Creating a successful business is not a part-time or even a 40-hour-a-week job, especially when you're taking on the world's first $4 trillion company. "This notion that somehow you can achieve greatness, you can build something extraordinary by working 38 hours a week and having a work-life balance that is mind-boggling to me," Cerebras CEO Andrew Feldman said during a recent episode of Harry Stebbings' 20VC podcast. Cerebras is trying to challenge Nvidia's dominance of the AI chip market.