It's not about efficiency, it's about convenience; and this is where the damned hydrogen conversation keeps going off the rails!

A tesla converts nearly 100% of it's potential energy into kinetic energy, but "refueling" is not convenient as an F150; which converts something like 15% of it's potential energy into kinetic energy, but can hold a _ton_ more energy and refueled in minutes.

It's ok to be far less efficient if convenience to the consumer is increased, as long as the power source was carbon neutral.