Superchargers are on average .28 cents per Kwh. Using this times the KW being replenished should be pretty easy math. 60 KW would cost $16.80, 80KW $22.40 and so on..
Well, I have a nice 1 year old Tundra so technically I don't NEED a new truck but hey, I imagine a Futuristic-looking Cybertruck towing a retro-looking Airstream is going to look quite BADA$$ driving down the Interstate....
That plus I don't ever foresee buying another gas vehicle. Ever.
At current levels, it will be an expensive and (I bet) finicky gimmick. If they actually show decent specs when they get closer to production I MIGHT consider it.