What new product categories did Nadella built that Ballmer didn't start?. Azure was started and then prioritized under Ballmer. Office for iOS was built under Ballmer but not announced to give Nadella a quick win on his start. Ballmer set his replacement very well on so many levels.

> Ballmer is a good used car salesman.

Ballmer was a very very good salesman. The reason Azure or all these new shiny MSFT products (e.g. teams) have a leg is because Ballmer already sold AD to almost every corp out there. Microsoft went from being 0 in enterprise to bigger than anyone else and that is now the main money printer and also the future of the company.

One thing everyone forgets is Nadella was nowhere to be found few years before becoming CEO. Ballmer made a very very good successor choice elevating Nadella quickly in few years.