We're well on our way to unified charging ports for all-electric vehicles in the United States. Tesla made its charging port free to use for any car maker that wanted to use it through the NACS standard, and lended its network of Superchargers to all cars using NACS whenever those land in the market. It's a huge step forward in fixing what's probably one of the biggest hold-ups with electric vehicles until now. Volkswagen is the latest car maker to commit to the standard.