Jobs' Apple tended to simplify the product lineup. Cook's Apple tends to rationalise product lines based on manufacturing lines, which is why you still see vest

Jobs' Apple tended to simplify the product lineup. Cook's Apple tends to rationalise product lines based on manufacturing lines, which is why you still see vestiges of older SKUs stick around—because the tooling cost for the motherboards, chassis, etc has already been amortised and it's cheap to keep it going.