I think that makes Serlet one of Jobs's most long-term colleagues. His deep experience of software evolution processes may be one of Apple's most underestimated assets.
The NeXT platform has gone through seven different CPU architectures (by my count) and an enormous API merger with the Mac OS, yet shows no signs of getting bogged down. Most other companies can't seem to manage an operating system for even a decade before it loses its momentum under feature bloat and internal fighting over direction (c.f. Windows Vista, Symbian).
(edit -- I initially wrote that Serlet designed Interface Builder for NeXT, but that was another Frenchman, Jean-Marie Hullot.)
And if people were flocking to Apple computers on the strength of their engineering, I'd agree with your point.
However, Apples' recent success has been because of its design sophistication which Jobs is rightly seen as the inspiration for.
I chose it over a ThinkPad at the time, which I considered roughly comparable, on account of the displayport. No other laptop in that price range had DVI out without an expensive dock.
The engineering that went into the A4 is quite significant, but you wouldn't know it was there - except that the UI is very responsive, the unit runs cool, etc.
So you are right in a sense: people don't buy Apple products for the engineering - it's the design. But the engineering makes them not crappy. So they keep Apple products because of the engineering.
Actually, I would assume that none of them are really cut out to be alpha dog. For Jobs it's been my way or the highway for close to 35 years (even if he was the one hitting the road at times). That's a personality type. None of them have a Pixar on their resumes.
If the future of Apple's success is depends on the transfer of magic between executives, antenna gate was a preview of the problems Apple faces. A deep bench is all well and good, but their can be only one successor.
(If usability is making a product easy to use, 'useful-ability' should be making the product fulfilling customers wants/needs.)
http://www.wired.com/gadgets/mac/commentary/cultofmac/2006/1...
The idea for the scroll wheel was suggested by Apple's head of marketing, Phil Schiller, who in an early meeting said quite definitively, "The wheel is the right user interface for this product." Schiller also suggested that menus should scroll faster the longer the wheel is turned, a stroke of genius that distinguishes the iPod from the agony of competing players.
Jobs' role is best described like this (from History of the iPod: http://lowendmac.com/orchard/05/origin-of-the-ipod.html#0)
Steve Jobs took a very active role in the project, scheduling frequent meetings with the directors from Fadell's group and PortalPlayer. During these meetings he would tell them in detail what issues he had with the device, whether it was the interface, sound quality, or the size of the scroll wheel.
This was rare for an Apple project at the time, and it reassured the leaders in the group that the project would not be axed immediately.
So while Jobs was absolutely involved and an influence he didn't "design the interface"
Five or ten years after that though? When Jobs' influence and vision has faded a little bit, maybe some new blood has come on board, and maybe some of the guys there already have gotten more traction for ideas that would previously had been shut down by Jobs?
I'm not saying it'd be a disaster, just saying.. who knows what the admittedly brilliant senior vice-presidents would do if Jobs weren't there. I guess we'll find out sooner or later.
I sincerely hope that Jobs' vision and obsession has rubbed off, because whether you like Apple products or not, their influence in the tech industry is sorely needed.
I suspect Jobs' influence pushed them from great products to fantastic ones but that's a role the executive team should be able to fill at this point. Look at the numbers...
Tim Cook (COO): Been working with Steve Jobs since 1997
Jonathan Ive (VP of Industrial Design): Been working with Steve Jobs since 1996
Bertrand Sertlet (VP of Software Engineering): Been working with Steve Jobs since 1997.
Scott Forstall (VP of Software Design): Been working with Steve Jobs since 1997
That's the bottom line for me. After working with Jobs' for 13 or 14 years you have to assume some of the magic has rubbed off. So this is a fairly competent group that should be more than capable of creating great products.