Sedan sales are nose-diving industry-wide these days, so it should come as no surprise that the Model S is likewise trending downward. Tesla’s big electric sedan dropped from 27,060 units delivered during 2017 to 25,745 last year. Tesla is likewise losing its federal tax credits during 2018 unless Congress extends them. In the meantime, Tesla has cut prices of all its models by $2,000 to help soften the blow among EV shoppers.