Last week, Rivian (RIVN) and Uber (UBER) completed a $1.25 billion deal for up to 50,000 R2 robotaxis. The two dealmakers — Rivian CEO RJ Scaringe and Uber CEO Dara Khosrowshahi — have known each other for years, and the agreement was in the works for some time. “Transportation, mobility is a small world, so I've known Dara for a long time,” Scaringe told Yahoo Finance in an exclusive interview. “We’ve been talking about this deal for maybe about a year, but different versions of it, and it’s hard to defi ...