Lyft's Atlanta launch signals an effort to carve out a piece of the robotaxi market. But it has a lot of catching up to do if it hopes to close the gap with rival Uber. Earlier this year, Bank of America analysts downgraded the stock to "Underperform" from "Buy" due to concerns that the ride-hail firm would lose market share to Waymo's California expansion and Uber's aggressive AV partnership strategy.