Tesla is focused on unit production, SKU minimization is a side effect. They are supply contained. Why make additional models of cars if you can sell more of the ones you already make instead? There's more than enough demand to support their limited SKU's, high price points and current production; for the moment. When Tesla manages to cap out on their demand, they can lower prices and introduce more models. But when that happens they will be at a scale where their economies of scale and vertical integration allows them to still make a large profit while their competition breaks even or worse.