I may have said this before in a similar article, but supercars are where EV has to grow to better catch on everywhere else. Supercars are icons. People see them and want them, and because most of us can't afford them we look to get something similar. This is how design elements like the front grill opening on the Aston Martin ends up on a Ford, or why for a while so many cars had halo tail-lights, or why so many headlights now include that little strip of LEDs.
Also, supercars are built for best possible speed and acceleration. The principles used are a lot of the same principles that help vehicles save fuel (good aerodynamics, efficient shifting, lighter weight, etc). The reason supercars aren't more fuel efficient is because they are performance driven, i.e. "big and shouty" engines. The problem of taking a supercar to the greener side is that to get the same kind of performance would mean more expense on body design from using more carbon fiber and lightweight metals, and lots of batteries to push the most powerful electric motor you can fit in the car. The weight of the batteries starts negating efficiency, and all of this starts costing a lot. But as we know with SSDs and RAM, it may start expensive, but if you can get it used enough, the cost comes down faster. So make expensive electric supercars, that way the tech involved gets cheaper and we can start buying electric cars that are as beautiful and cheap as many of the gasoline powered cars we buy today.