[andrewia]

Increased density could help with packaging. You can already see this with the Lucid Air, which has a very deep frunk and trunk, as well as deep footwells. The Air also has full-size interior volume but with the vehicle length of a mid-size car. Better packaging enables sedan-shaped EVs, and also can enable crossover EVs with better ride height (since their skateboard can be thinner).

This could also enable removable battery modules. I could envision an EV with 150-200 mile range for everyday driving, with additional batteries kept at home connected to energy storage (like a Tesla Powerwall). When you want to go on a road trip, you just disconnect the modules and install them in the lower part of the frunk and trunk. The packs could also have other uses - you could load one into an electric motorcycle (much like the Zero Motorcycle already can). If you're desperate for a charge but don't have a plug near a parking spot, you can lug a module to a wall outlet. And we've seen how additional batteries enables additional current (and therefore performance), so EV sports cars could be lower-horsepower "daily drivers" until you install the batteries for a weekend drive.