> Ballmer wins... 2010: Microsoft creates Azure
The Azure project was run by Nadella before he became CEO. And it succeeded despite Ballmer. Azure was seen as the Microsoft cloud, where people ran Windows Servers. But Microsoft had long lost the battle for the server space to Linux.
When Ballmer stepped aside, only then could Nadella drop the limiters and push the Microsoft <3 Linux perspective to get the message out that Azure is a home for Linux workloads too.