A sad changing of the guard - vale Sergio Marchionne - was the most popular story here on just-auto this week. In what could be seen as a prescient move, we had only recently published Ray Hutton's insightful look at the likely future of Fiat Chrysler Automobiles after CEO Sergio Marchionne 'leaves' and this column last week was titled Life after Sergio - the week - I certainly did not mean that as literally as it turned out.