They do still make box, 'cause I ordered a box Kelly only two days ago.. My SA showed me the order list for the Autumn bags and there were several in box, but not many colors, mostly black (rigid and souple) and the chocolate I preordered... The low production might also be for the reasons you mention above, but what my SA said is that in these last few years people prefer the "grainy" more souple leathers to the smooth and more rigid ones (at least in my country) and also box isn't very popular because it's delicate...