Joke is on them then. Prices of all commodities are going up. Sodium is on the uptick on a yearly scale.
When solid state batteries technology comes online it will be a game changer for EVs!
They buried the information that sodium battery has about 60-70% of the energy density of lithium ones. So yes the winter loss in mileage is less but the total is smaller to begin with. That is why the car mentioned only has 300 miles of range when lithium in good weather can do over twice that.