Uber's network effects could make it the app robotaxi fleets need to keep their cars fully operational. It is one of the best platforms on earth and a five-year buy at today's valuation, with opportunity too compelling to pass up despite shares falling about 25% in the past year on robotaxi fears. Bookings grew 24% last quarter and trailing free cash flow exceeded $10 billion. Waymo and Tesla could choose to bypass Uber; Waymo already runs its own app in most of its cities. x.comÂ