As a devoted NBA fan, I only tune in to college basketball once a year—for March Madness—hoping to see the next big star. And that’s what I was thinking about watching Y Combinator’s Demo Day this week. For the uninitiated, Demo Day is the culmination of YC’s twice-a-year accelerator program, where founders pitch to investors. It was my first time attending, and I joined on Zoom. Watching YC’s winter 2024 batch move through rapid-fire pitches, I thought: It’s hard to pick stars—whether that’s bi...