Supercharging is super cheap compared to gasoline, so I wouldn't factor that into the S vs 3. Reports say the 3 drives very similar to the S, so you still get the full Tesla EV experience driving a 3. Plus autopilot is available on the 3 as well. So it basically boils down to do you need luxury and a lot of interior space. If the car is just a daily commuter car, then nope. Go for the 3, save some money. If you like bells and whistles, go for the S.