I was on board until they got to the price tag.
A golf cart gets infinity.
There won't be any way to figure out the real difference in costs until we see how much it costs to plug in your car every night. A 40 mile car would do me good 90% of the time, but not so much when I need to drive to the ski slope in bad weather.
I still think $40k is a lot to pay for a small car. Remember that the $40k price tag is already subsidized by every American taxpayer.
The miles would hardly get me from my home to town and back home again. Usability is a key factor for any vehicle - and this one is no exception.