Apple’s share price shrugged as though the resignation of the company’s visionary leader hardly mattered. That surprised me. Of course it helps that Steve Jobs will still be chairman–though how active a chairman, and for how long, remain to be seen. And the top of the company is full of exceptionally talented people: that’s clear. But it seems to me that Jobs’s personality and the astonishing success of his company are as tightly integrated as…well, you know what.