Why do Range Rovers depreciate so fast?

They simply don't care. As Doug DeMuro posited, Range Rover owners want the newest and the best鈥攏ot the most reliable. They buy the latest model, which means it's under warranty, then sell it when a newer one comes out. This kind of behavior explains why luxury vehicles lose so much value, according to iSeeCars.Dec. 2, 2019Why Are Range Rovers so Expensive and Are They Worth It?

Why do Porsche Cayenne depreciate so much?

More depreciation occurred because the potential owners of these cars did not want to be saddled with further expenses. Then came the do-it-yourselfers. As soon as used Cayenne values descended toward the magic $10K mark, the market changed significantly.Why does the Porsche Cayenne lose so much value so fast? - Quora