I detailed the windy, sometimes bumpy and other times fascinating first year of Microsoft CEO Satya Nadella. From the aftermath of the $7.2 billion Nokia acquisition to a complete overhaul of how the company views its Windows operating system, Nadella is a remarkably different chief executive than Steve Ballmer, but working within the same constraints and largely toward the same goals of making the Redmond, Wash. company relevant, cool and wanted once again.