Scale AI’s 30-year-old billionaire cofounder has a warning for anyone who craves work-life balance: ‘maybe you’re not in the right work’

• The billionaire cofounder of Scale AI, Lucy Guo, has a message for anyone who craves work-life balance: Maybe you’re in the wrong job. This millennial wakes up at 5:30 a.m. and doesn’t clock off until midnight—and it’s a philosophy that’s catching on among founders now openly embracing China’s 996 grind.

Work-life balance has become the holy grail of modern employment. It’s the non-negotiable perk that trumps salary and title—with Gen Z and millennial workers willing to...