One objective is approaching quickly: Volkswagen will pour another $1 billion into Rivian after reaching a technological milestone of successfully testing the joint venture technology in winter testing in one or more vehicles. The good news for investors is that Volkswagen and Rivian plan to begin winter testing by the end of this year, evaluating system performance in intense conditions on Volkswagen's ID Every1 concept vehicle.A huge part of Rivian's software and services gross profit was driven by its pa ...