Porsche’s Cayenne has made enormous strides since it first debuted roughly two decades ago. Not in performance, refinement or driving excitement — although it’s certainly come a long way since then in those fields — but in simple respect and admiration. When it debuted, after all, the idea of Porsche building an SUV was downright heretical. This was 2002, remember; enthusiasts were still pissed about the 911 going from an air-cooled engine to a water-cooled one. The idea of