The larger importance of this is that for a lot of potential ev purchasers, 400 miles is the lower limit of what they consider acceptable range. Yes, I know tha

The larger importance of this is that for a lot of potential ev purchasers, 400 miles is the lower limit of what they consider acceptable range. Yes, I know that is rather arbitrary and irrational, but that's how it is. 400 mile range is also important for political debates about the practicality of ev's and whether or not governments should be promoting them.