Rivian have always struggled to bring down the cost of manufacturing their EVs. This is one of the biggest issues they have when you are making an EV battery & motor are 2 of the most important components of the car. In Rivians case they both are sourced and not done in-house. They got carried away making a luxurious car, custom screen setup (rather then leveraging Carplay or Android Auto) & good looking interior. If you want to be in a profitable in first place they should done total inverse, focus on making a great battery & motor like Tesla did and try to source out other things. This is one of the reasons why BYD and Chinese EV companies are destroying all their competition, they do majority of things in-house.