Having driven my 2017 Model S90D into 47 states in the past two years, I am constantly amazed at the Supercharger infrastructure and the "moat" it has created in for the business model. In 2018, I was impressed how seamless the supercharger network was driving literally coast-to-coast. And this year, it was even easier. However, there is still a major gap on I-40 between Little Rock (AR) and Tulsa (OK) which is just begging for something to be done around Ft Smith. With ND and Canada coming on strong, it looks like the major northern gaps are finally being closed. But there's a difference between gaps on highly traveled through-routes and travel endpoints. I started wondering about what else might be missing. What large population centers are completely missing? It seems to me that Charleston (SC) has no practical Supercharger service. Where else is missing?