alt Hacker NewsI think it is already as narrow as you can put 2 seats side by side. But then indeed it becomes a tradeoff between size and efficiency. They went for maximum efficiency. And it is still 26cm shorter than a Model 3. So while not an compact car, not overly large either.
You’re comparing against a car that is difficult to use on UK roads due to its length and (to a lesser extent) width. Perhaps in the US it’s not that big, but here it is.