What are the reasons for this ?
The advantage is to position the driver as close as possible to the front of the vehicle, like in a buggy. Thus, the driver has a direct and peripheral vision, slightly afffected by the bodywork of the vehicle.
The advanced position of the driver requires to have an engine at the rear. In order to have an engine compartment that is as little visually imposing as possible, it was necessary to have vanishing lines on the bodywork that stretched between the front and the rear of the vehicle.
These shifty lines make the authenticity and 𝗔𝗗𝗡 of the Scarabee today.