I think the answer for this will vary largely depending on where it's coming from hence the options. (EU vs US) I'm one to believe that a car's on-board AC charger makes a lot of difference. It doesn't matter if long distance driving is DC fast charging (it is), AC charging makes a big difference when you consider how abundant it is. Speaking from a EU-grid framework, 3 phase plugs are virtually everywhere if you look around and they have a minimum of 11kW power. (16A * 3) 32A 3 phase plugs have 22kW of power which is 110km/h for the Model S but it will be 135-140km/h for the Model 3 which is really, really good. Most EV manufacturers shy away from a high speed on board charger I think because of the costs involved but for me they really do make a huge difference. For example the new Hyundai Ioniq has a 25kWh battery whereas the new Renault ZOE has 41kWh however Ioniq's charger is only single phase 7kW and ZOE's is a minimum of 22. If it wasn't for the 22kW charging ability I never would have considered the ZOE and get the Ioniq despite a much smaller battery. Yet, same as the Bolt EV (Ampera-e) 7kW charging isn't much. My country has nowhere near a developed DC charging network but three phase plugs are everywhere so it makes a big, big difference. I think everyone focuses on the battery pack capacity, overlooking the replenishment rate of it a.k.a. charging. After spending a year and a half with a 3.7kW on board charger EV and seeing how 3 phase 11-22kW plugs (40A-80A plugs for US) are everywhere, I can't wait for a 22kW charger. Those plugs will feel like a fricking Supercharger. (poor country's Supercharger, lol) My concern is because Model 3 must be kept cheap, Tesla could shy away from such a charger saying; "just supercharge". They have already taken a step back with the Model X and facelift Model S by reducing max. possible AC charging from 22kW to 16kW. What are your thoughts?