[slowmovintarget]

Usability is a sub-discipline of user experience, which is a sub-discipline of... wait for it.. design.

Design, from designare - to mark out, to prepare the plans for, especially to plan the form and structure of

Usability is just one area of emphasis for design. Apple simply included too few elements of usability in their efforts.

[altarius]

Definitely. It's also mostly Steve Jobs'/Apple's definition. But in the context of discussing Apple, many often solely talk about the shiny exteriors and looks of Apple products while neglecting usability.

We may disagree, but the usability used to be and maybe is again the main selling (or at least "staying") point. I think this was lost a bit during Apple's "high design" years before Ives departure. It was often form over function.