adding mass increase the costs of tires (ongoing) wheels, shocks and other suspension bits that have to be stronger and bigger to support the mass, and it increases wear on roads too. so energy density does affect upfront costs and lifetime costs.
Again, an 11% increase. It's tiny. My point is that it's vastly outweighed by other effects, not that it literally does not exist.
I'm making the case that treating the specific energy/energy density of batteries as the end-all, be-all is foolish. I am not arguing that it is nonexistant, just not relevant.
Sure, but if you're going to go that direction with your argument you need to account for the environmental damage caused by burning fossil fuels inefficiently in motor vehicles.
