SAN FRANCISCO—A federal trial featuring two heavyweight technology companies is intriguing on its own. Toss in an unpredictable judge, A-list witnesses and some warlike rhetoric, and the legal battle between Alphabet Inc.’s Waymo and Uber Technologies Inc. turns into a spectacle that offers a revealing look into Silicon Valley culture and personalities.
On Thursday, as the fourth day began in a trial expected to last at least two weeks, neither party has notched any obvious big wins, but the proceedings have produced moments…
