A Tesla bull debates a Tesla bear

Tesla’s share price will travel in only one direction—up. Despite accelerating in “ludicrous” mode, by more than 700% in 2020, Tesla has plenty left in the tank, to borrow a phrase that the firm is consigning to history. Its impact on the car industry cannot be overstated. But it is a mistake to judge it by the standards of the firms it will leave in its tracks. Tesla is a technology firm, set to disrupt not just carmaking but personal transport, energy (thanks to its battery technology and solar power), robotics, health care and more besides.