I think it's like any existing vs new tradeoff. Tesla didn't have any existing, so their clean-slate math was clearly in favor of 100% new technology. (Well,

I think it's like any existing vs new tradeoff. Tesla didn't have any existing, so their clean-slate math was clearly in favor of 100% new technology. (Well, they did have 12v existing in their other cars, but they were clean-slate in the truck.)