Here's an excellent article on the coming e car boom from the...

Here's an excellent article on the coming e car boom from the New York Times entitled
When Will Electric Cars Go Mainstream? It May Be Sooner Than You Think

https://www.nytimes.com/2017/07/08/climate/electric-cars-batteries.html

It's quite long...here's an excerpt

Between 2025 and 2030, the group predicts, plug-in vehicles will become cost competitive with traditional petroleum-powered cars, even without subsidies, and even before taking fuel savings into account. Once that happens, mass adoption should quickly follow.

“Our forecast doesn’t hinge on countries adopting stringent new fuel standards or climate policies,” said Colin McKerracher, the head of advanced transport analysis at Bloomberg New Energy Finance. “It’s an economic analysis, looking at what happens when the upfront cost of electric vehicles reaches parity. That’s when the real shift occurs.”