tl;dr: Rivian's CSO defended the company's refusal to support CarPlay by claiming it "takes over every single pixel," but the author counters that standard CarPlay doesn't take over the whole screen (only optional CarPlay Ultra does), and that CarPlay is entirely optional for drivers anyway. The author argues CarPlay is purely additive—if Rivian's native UI is great, customers won't use it—and says he won't buy a Rivian until they add support, despite otherwise loving the vehicles.