Yes, because building a 1 off custom hovercraft and then trashing half of Stratford is cheap. Although I doubt they built the hovercraft.
Its an entertainment show for more than just car fans. And going by the way my GF just wet herself laughing, its working.
As for the SLS, does anyone else see the future being hybrids from that? The only problem with the electric SLS was the range, which is easily sorted with a small quiet petrol engine charging the batteries.