Only John Gruber:
The turning point is clear. The headline of Apple’s October 2012 press release said it all: “Apple Announces Changes to Increase Collaboration Across Hardware, Software and Services”. It turns out that was not an empty bromide, meant to patch over run-of-the-mill corporate political conflict. Tim Cook wanted Apple to function internally in a way that was anathema to Scott Forstall’s leadership style. The old way involved fiefdoms, and Forstall’s fiefdom was iOS. The operational efficiency Cook wanted — and now seems to have achieved — wasn’t possible without large scale company-wide collaboration, and collaboration wasn’t possible with a fiefdom style of organization.
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