Some would not have bought a Leaf with 200 mile EV range over a Volt. EV power delivery is superior to ICE, but only if it doesn't suck.
Leaf's are too slow. There is an acceptable threshold of acceleration for the $35k auto market and the Leaf doesn't have it. Handling like a minivan sure doesn't help either.
If that were the only option at that price point, perhaps. But it's not.
The Spark EV has acceptable acceleration (about 1/3 more acceleration, on par with the Volt), but too little range to be realistic, just like the Leaf.