The Cadillac Escalade has been king of the hill for American luxury vehicles for many years: an expensive, hulking, leather-lined behemoth that’s the picture of ostentation. But not anymore. The redesigned 2018 Lincoln Navigator has upended the order of things with its newly redesigned aluminum-intensive frame that brings a healthy dose of classic American mid-century modern design to the luxury automotive landscape. Lincoln dealerships can’t keep them in stock, even though fully loaded Black Label trim models easily top $100,000 (for the record, Escalades aren’t any less expensive). But drive the two back-to-back and they couldn’t be more different. I recently had time in both the extended-length 2018 Lincoln Navigator L Reserve and Cadillac’s massive 2018 Escalade ESV Platinum.