If I was in charge I’d be tempted to only make model Y. It would pick up all the demand and it’s probably the cheapest to make. And you’d save money not running four different production lines.
Shame we don't have the model sales numbers from Tesla to be more specific here.
Ironically, Tesla receives a significant amount of criticism/hate for the small size of their product line up (four models, where each pair of two is very similar: X & S, and Y & 3). Many analysts and critics fail to appreciate how much market opportunity exists for a single very well-executed vehicle per major category, such as "small SUV."