While many start-up EV makers are grappling with difficult headwinds, Rivian continues to shine.Despite the narrative that start-up electric vehicle (EV) makers are struggling, and that the EV growth rate in the U.S. has slowed, Rivian Automotive (RIVN -0.25%) continues to tally up positive developments. Edmunds.com named the R1T launch edition its favorite EV among start-ups. What's more, Rivian inked a joint venture deal with global automaker Volkswagen for up to $5 billion, and it topped second-quarter d ...