From a business perspective, he needn't worry. There likely aren't many Uber customers who use the service but dislike it enough to switch. So, Chariot's growth will come from people who don't use ride share, which means if it succeeds, it'll expand the market. People become less afraid as they become more familiar, so a percentage of Chariot customers will start riding Uber as well since they see Uber drivers are very similar to Chariot drivers. In the long run, Uber could have more customers because of Chariot and possibly purchase the company outright.