Two questions if that’s the reasoning: how often are you driving 600 let alone 300 miles? How often are you out of range of charging, if at all? Charging at fast chargers already only takes 20 minutes, the same amount it takes to pee and get a drink.
Charging at home makes range not matter. It’s not gas, you’re just always charged up. You don’t want to sit at 100% anyway, because again, it’s not gas.