Why does fuel economy get better on the highway, but EV range gets worse?

Question

Why does fuel economy get better on the highway, but EV range gets worse?

In: 463

Answer 1

EV’s are more efficient overall but as waste increases with speed efficiency drops at high speed, ICE are tuned to be efficient at certain engine speeds.

So this is a non-issue, if not the lack of range of EV’s.