People have driven more than 1 billion miles in Tesla, Nissan Leaf, and Chevy Volt electric vehicles. This signifies that the public, and the electric vehicle manufacturers now have over 1 billion miles of EV driving experience and test data.
This is critical to the electrification of the automobile, as early adopters are putting EVs to the test. When they fail, manufacturers learn of the mistakes they made, and enhance their electric vehicle designs further.
This also entails that many more than the billion people have been exposed to electric vehicles (due to the fact that they give their friends lifts and test drives in their electric vehicles).
Early adopters got today’s big industries where they are, and they are doing the same for the EV industry.