I think that was the point of a recent article - Niedermayer, I think - most of the driving I do is commuting, and I don't really need more than the 150 mile range that 42 kWh pack gives you...

The flip side is the smallest Tesla is 3700 lbs or so, vs i3 is a hair under 3000

Technologies evolve, though, so I feel like the next (potential) revolution is to use a light CFRP chassis like the i3 w/ next gen batteries.