Well, to be fair, a Model S weighs more than some F-150s, and a Model 3 can weigh more than 4000 pounds, which is pretty porky for such a small car.
But ... I don't see what that really has to do with paying for roads. We will replace the gas tax, and in fact most places are already talking about how to do it. Doesn't seem like an intractable problem at all, and will probably be fixed well before EV adoption gets into the double digits.
I agree wholly on the second point though I will say as per the weight thing, the Model 3 actually weighs about 150 pounds more than a BMW 3 Series, its direct competition. Not a really light car but also not crazy heavy as claimed. The same goes for the Model S whereas its competition the MB S-Class, Audi A8, and BMW 7 Series all have similar weights.
They are heavy cars for sure, compared to most compact cars, but that's more of a factor of their size and class rather than their drivetrain. Future BEV's will gain range from lighter drivetrains so it's def. a goal they will be seeking.
But ... I don't see what that really has to do with paying for roads. We will replace the gas tax, and in fact most places are already talking about how to do it. Doesn't seem like an intractable problem at all, and will probably be fixed well before EV adoption gets into the double digits.