"We're just concerned that, if they can't find a way to build a business outside of the cities, it's going to be tough to generate another three to four years of that growth rate." Galves' comments came on the same day Uber unveiled a host of updates to its app and services, including merging its ride-hailing and food delivery services into the same app while also adding features designed to improve security and encourage multimodal transportation. Investor's have become increasingly skeptical about Uber's long-term path to profitability as its losses swell and growth wanes. Uber, which went public in May, has seen its stock lose roughly 25% of its value over the past three months. The shares closed down modestly Thursday at $31.57. In August, Uber reported a net loss of $5.24 billion for the second quarter, largely due to stock-based compensation. Subtract that expense and Uber still lost $1.3 billion, wider than in the preceding quarter.