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It's definitely a point that different places in the world have different needs and different use cases. North America has the challenge of extreme cold and long driving distances. Some places have clean grids and others are less so. Fuel is also very cheap, while electricity is often not (though it is reliable).
Where I live now, the grid is around 85% "clean" and getting cleaner (I'm not denying hydro and wind don't have downsides) with low electricity prices and high fuel costs, and the weather is always mild, so what works well here may not be ideal in other areas.
The downsized genset is definitely a point, and something I'd consider, as is a removable one, but without intelligent management (route and intention awareness) it's at the mercy of the competence of your average driver. I suppose any idiot-proof system naturally has compromises. Pick your poison.
I wonder what percent of the world's (car owning) population has high levels of electricity insecurity? South Africa's case seems relatively uncommon, though I may simply not be aware of others.
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