I can't believe something like this would get any further than artist's renderings. The visibility would be shite. Even for limited purpose use like in a large warehouse lot where they need something just to move trailers around the lot. I'd have thought any dolt could see this being a problem, but I guess not
The design was driven by regulations that limited to total length of the truck but not specifically the trailer. Smaller tractor, bigger trailer, more carrying capacity, more profit. Sure, visibility is shite, but if it is legal, they will get it, because carriers are here to make money.
But it turned out not to be legal, and regulations changed, now specifying different limits for the trailer and the total length, meaning it lost its main reason for existing.