As the X will not have a fuel tank which 99% of rear seats of ICE cars rest on, why can the 2nd row seats not lift up to give more room for luggage? Also if you have dogs the low step into the car is a bonus instead of having to jump high into the trunk. This reduced entry height is good for heavy objects as well. The other bonus is because the height is greater than in the trunk, more variety of goods and be transported including bicycles positioned sideways or tall objects stood up etc. The seats below are in the Honda Jazz/Fit. They are able to do this because they squashed the fuel tank flat. This feature is used a lot more than you think. It is very simple to use, you just lift the seat back and fold the black metal legs in. To return them down simply pull the legs out.