I'm confused.
Roadster: cool name for a sports car. First Tesla car gets cool name
Then Elon starts mass production cars and develops "Product Family" with "Branding":
Model S: First mass produced Tesla. "S" for Sedan
Model X: Second mass produced Tesla. "X" for cross-over (SUV/minivan)
Model E? What's the E for?
Elon doesn't strike me as the egocentric type to name a whole car line after himself (E-lon's car), and if he did, wouldn't it have been the first sports car, not the "affordable" everyperson's car..(That can't really be what E-stand for, could it? That would be kinda lame...)
Maybe Every Day Electric?