[ksec]

I think you and your OP are both correct.

50 cents x 4, along with the other increase likely $5+ of BOM cost increase could make or break a consumer product. But your reason is also true as it improves UX.

This is where innovation and Apple comes in, you need to market the product with a features that masses of consumer believes in it and are willing to pay for it. ( Lots of people, including those on HN often mistaken innovation as invention )

There is nothing "American" about this business practices, it is the same as any European, Chinese or Korean Manufacturers. They could have very well put this feature in but I am willing to bet $100 it wouldn't make a difference to consumer's purchase decision. So why continue to add $5 or more for a feature they cant sell.

But Apple has the ability to move consumers, and to charge higher ( as a package along to this feature ) to demand a premium. And if Apple successfully market this feature, say with some sort of brandname like "QuickSwitch", it is only a matter of time before other manufacturers copy it.