Operations is great to have and Cook is really good at it. Focus on ops can destroy the creative process though.
I figure another 8 years and we'll know for sure (Ballmer clocked in at 14). I look forward to being wrong, Cook is a great human being.
During that time, their stock price fell at least 10%. The launch of Windows Vista was bungled (XP outlived Vista). They had a string of failures in the phone market, before finally abandoning it. They had a string of failed acquisitions, including Nokia. Remember the Microsoft Stores?
Azure was the only real lasting success acheived under Ballmer.
Fixed the typo.
Tim Cook is about 2/3rds through of Ballmer's tenure. If you were to take a bet today, do you see Tim Cook doing the direction of Ballmer?