Snapchat always proved critics wrong. Then Evan Spiegel pushed for a redesign

Most CEOs would probably prefer not to overhaul their core businesses less than a year after an initial public offering. It’s a pivotal period when executives look to play up their company’s stability and growth to a world of potential new investors on Wall Street. Arlan Hamilton: She invests in tech founders others ignore. And it’s working Mary Barra: Her impatience could save GM. ‘Time is not our friend’ Read all 14 Risk Takers profiles The plan: separate content from friends and publishers — and celebrity users — while attracting new users by making the app easier to use. Spiegel said at the time that the move could be “disruptive” to Snap’s business. That proved to be an understatement. A …