Silicon Valley has a reputation for being a place where young geniuses are too busy disrupting the world to buy clothes; jeans and a hoodie generally qualify as business attire. But that is changing, the New Yorker fashion correspondent Rachel Syme notes. Tech moguls have become more conscious of appearances, and a distinctive look—based on optimized, streamlined garments, like trendy Allbirds sneakers—is emerging. Tech moguls have become more conscious of appearances, for better or worse; Elizabeth Holmes, the disgraced founder of Theranos, raised hundreds of millions of dollars partly on the image she cultivated with a turtleneck à la Steve Jobs. Syme spoke with the professional stylist Victoria Hitchcock, who runs a thriving practice in Silicon Valley showing the powerful how to project “powerful” for the digital age—without looking like a bunch of bankers. Plus, Helen Rosner talks with Niki Nakayama, one of Los Angeles’s top chefs, about setting up a kitchen that is hospitable to women, and about the impossibility of creating authentically Japanese cuisine in America.