Earlier quoted context omitted.
Hardware people, in my very direct experience, are terrible at software. But we can hope.
Software people, in my very direct experience, are terrible at hardware... While in jest, I do think most software engineer's understanding of hardware abstractions is pretty poor and does disservice to the hardware they run on. I know between Moore's Law and Gate's Law which one I would prefer to be the industry standard... https://en.wikipedia.org/wiki/Andy_and_Bill%27s_law
I don't think it means anything for this particular move; good leaders know what they know and what they don't know; they know how to motivate and select the right people, they know what to delegate and what to control. Having a track record of success of any kind is IMHO always the best start. I'm excited to see what kind of changes the transition from an operations person to a more technical leader may bring. Especially given how awesome Apple's hardware has consistently been.