Apple was going stagnate (as far as creativity goes) long before he left the company. Stabilization is very common in the industry. Microsoft is there. Google and Facebook are getting there. Apple is going there kicking and screaming. Amazon will do so one of these days. That is business - you can't explosively grow forever.
Once a company plateaus the need for constant creativity diminishes. The creative ones will move onto the next thing, as they have always done.
Once a company plateaus the need for constant creativity diminishes. The creative ones will move onto the next thing, as they have always done.