I stopped reading HBR years ago, because I missed this kind of sharp thinking.
One thought is missing, though. Jony Ivy was meant to be the innovative counterpart to Tim Cook, and he was given all the resources wanted (not just those needed ...). And was forced to be a product manager, too (when he became responsible for software as well).
The article suggests, that there might be a better choice than installing an executor as the successor to a genius. I doubt that.