Sure, but you wouldn't expect FedEx to replace their entire fleet this year. A somewhat more meaningful number is how many new FedEx freight trucks will be buil

Sure, but you wouldn't expect FedEx to replace their entire fleet this year. A somewhat more meaningful number is how many new FedEx freight trucks will be built by Tesla over the next year. And UPS has placed an order for 125 of them (https://electrek.co/2018/03/26/tesla-semi-electric-truck-order-fedex/ https://electrek.co/2018/03/26/tesla-semi-electric-truck-ord...) as well. You're right that this isn't going to radically transform the country's freight fleet overnight, but I think it's a signal that these companies are willing to switch to EV technology if it works. The next hurdle now seems to be Tesla's ability to execute.