https://www.wired.com/story/most-successful-entrepreneurs-middle-aged/

Back in 2007, a 22-year-old Mark Zuckerberg gave some advice at Y Combinator's Startup School: Do a startup before you're old. In technology, he said, twentysomethings rule. The olds are useless.

“I want to stress the importance of being young and technical,” he said. “Young people are just smarter.”