When it doesn't require tax credits and subsidies paid for by tax payers than it might be somthing to look into, until that time it's just a delusional fantasy land.
They probably needed heavier weights to get the rpm. down, so it wouldn't suck so much gas. On a flat hard track you don't need an optimal clutching set up to achieve high speeds.
I drove my sled from Sheboygan wi. To copper harbor in 13 hours with no preparations no support team stopped for gas lunch and beer and drove the last 100 mi. In a snow storm. Back and forth wide open on a closed course..not impressed