Professionals also can (and do) get a ton of mileage out of the Air. I don't see why a distinct 15" Air model couldn't have targeted the same market. Also, jus

Professionals also can (and do) get a ton of mileage out of the Air. I don't see why a distinct 15" Air model couldn't have targeted the same market. Also, just because professionals aren't hardcore computer nerds doesn't mean they don't desire to upgrade. In particular, creative professionals (graphic artists, video editors, musicians) can always make use of more storage and performance, and in days past, many of these non-nerds would become savvy enough to upgrade whatever they could. Hell, even my parents know what memory is, and that more is better. It's Apple's product line, they can do what they want. But as a result of their decision, many power users are clinging to the last-gen product line, because it's still upgradeable, and a truly "Pro" Mac laptop is no longer available for sale. (Technically, you can still buy the old form factor, but we all know which way the wind is blowing.)