Uber Technologies Inc.’s (NYSE:UBER) partnership with Alphabet Inc.‘s (NASDAQ:GOOGL) (NASDAQ:GOOG) Waymo could reportedly hit a sour note as executives from the ride-hailing giant have criticized the latter’s expansion.

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Waymo’s Expansion, Scary San Francisco Moment

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Uber executives have painted AV-only operators like Waymo as less scalable and less reliable than a hybrid approach, with human drivers and Robotaxis being offered on ride-hailing platforms, Business Insider reported on Thursday.