Earlier quoted context omitted.
So Nadella is half as effective as Cook? More seriously, I shouldn't have put the comparison to Nadella in there at all. They are both great CEOs.
Exactly, Satya Nadella is an awesome leader. Who is to say Tim Cook could have taken all these difficult challenges which MSFT was facing at the time? It's 100% speculation.
Cook probably wouldn't have ever been a good fit for Microsoft. His expertise is in physical products logistics.