Tesla has done what it should have done before. After nearly a year of the long-wheelbase version being available only in China, the Model YL is now available in the U.S. — and this time with a truly usable third row. 31 inches of rear legroom is a game-changer. Finally, it's not about squeezing kids or luggage. It's a third row where you can fit an adult passenger without wondering if they'll ever walk again.