Andrew J. Hawkins / The Verge : Uber plans to invest $1.25B in Rivian through 2031, contingent on meeting autonomy milestones, starting with $300M at signing, to deploy 50K Level 4 robotaxis —  The companies say they plan on deploying 10,000 autonomous Rivian R2 vehicles by 2031. … Uber and Rivian are joining forces …