Fourteen years ago, Kia was last on J.D. Power's quality survey; today, it's second behind Porsche. That's a big deal, but what does it have to do with the new 2016 Optima? Turns out, pretty much everything, inside and out. It's Kia's best-selling vehicle for the past three consecutive years, not to mention its first model to top the 150,000 yearly sales mark, with demand up 480-percent versus 2010.