With respect to electric cars the actual energy density is only half the story. Efficiency can be gained with pack efficiency, aerodynamics, weight reduction o

With respect to electric cars the actual energy density is only half the story. Efficiency can be gained with pack efficiency, aerodynamics, weight reduction of the vehicle, including smaller low occupancy vehicles enabled by the Mobility-As-A-Service model, and removing material with the help of better computer simulation and modeling, more efficient energy recapture systems, energy efficient accel/decel algorithms, denser destination charging network, skate systems like Boring Loop, all of which can decrease battery size which itself increases efficiency even further. Similar to density in chip design, as density hits fundamental limits, other axes of power can help keep improvement at least linear.