Every drop of lithium counts. Our cars are not optimized for a smaller size. Then a reasonable sized car can take a larger size but less weight density battery.
I believe there are low Lithium Battery inventions not yet discovered. Perhaps lithium can be taken more advantage of if some volume is replaced by lightweight lithium enhancing plastic materials.
We have a lot of different plastics. There should be a reason why. Maybe there are plastics that can enhance the small amounts of lithium present in a low Lithium Battery.