If ever there were a vehicle that could be described as “ionic,” the Jeep CJ/Wrangler would be it. It’s overall shape hasn’t changed much since the U.S. entered WWII in 1941, and neither has its off-road capability. The current version, the Wrangler JK, has been around a decade now, having debuted for the 2007 model year. By now you know Jeep is readying its replacement with the 2018 Wrangler JL – an SUV rumored to be far superior to the JK in nearly every way, both in on-road comfort and off-road ability. But before the last new JK rolls off its Ohio assembly line, I spent a week living with one of the most hard-core versions: the Wrangler Unlimited Rubicon Hard Rock.