Rivian’s three-row R1S is an astoundingly quick electric SUV with a generous driving range. Owners are also sure to appreciate the plentiful driver and passenger space, plus the ample cargo room. But it rides too stiffly, and it takes extra concentration to drive the R1S smoothly thanks to its aggressive regenerative-braking system. Then there’s the unintuitive interior controls: Far too much reliance is placed on the center-dash infotainment touchscreen for even basic functions, such as adjusting the side mirrors and the air vents, which adds to driver distraction.