I'd love to be able to expand my wifes iPad, but I think Apple don't offer it (the ability to expand the capacity) for two reasons, the first of which is price

I'd love to be able to expand my wifes iPad, but I think Apple don't offer it (the ability to expand the capacity) for two reasons, the first of which is price - the retail difference between 16Gb and 128Gb is almost pure profit. The second resaon though, is that it introduces a level of complexity Apple are unlikely to be comfortable with[1]. Users now have to be aware of where stuff is being saved (flash or sd card), and the OS UI needs to be updated to provide this option. [1] unfortunately, iCloud seems to wildly disprove my point ...