i8 is not a supercar, but it certainly does look like one.
The only cars mentioned in this thread that are supercars are the Lamborghini and Ferraris. Although not models like the California etc.
Exclusivity & high price are a requirement. Not merely performance.
I would class the original Honda NSX as a supercar, but certainly not the current one.
And Tesla...…
…. not even a super car, never mind a supercar