With the Model 3 serving as the mainstream sedan, Roadster as high-end sports car, and Model X (& Model Y) as family vehicles, the Model S seems a bit superfluous by 2020-2021. It won't be the biggest, the fastest, or have the longest range. It will also be very old by that point, from a car model perspective. So should Tesla stop making the Model S, refresh it, or keep it as is? In my opinion, Tesla should discontinue the Model S for a year or so, then redesign the 2nd gen Model S as a luxury sedan with the kind of interior trappings of the Lucid Air or similar and increase the range to 450 miles or so - not enough to compete with the Roadster, but solidly more than the Model 3.