https://techcrunch.com/2019/08/03/tesla-brings-back-free-unlimited-supercharging-for-the-model-s-and-x/

Tesla is resurrecting a popular benefit that CEO Elon Musk once called “unsustainable” as it attempts to boost sales of its more expensive electric vehicles.

Tesla announced Saturday that all new Model S sedans and Model X SUVs will come with free unlimited access to its network of electric vehicle chargers known as superchargers.