Electric cars would not sell anywhere near as good if they weren't exempt from taxes and cost twice as much as they do now.
In other words, when you take away the implicit subsidies for the unpriced carbon, electric cars become cost-competitive?
(In Norway, the electric grid is primarily renewable/hydro based[1]... yes, I realize this argument is different for countries with different electrical makeups)
[1]: https://en.wikipedia.org/wiki/Electricity_sector_in_Norway
It's not like they're cheap, but the fees are insanely high for ICE cars in Norway.
Example: A BMW M550i is from what I can see $73,400 in the US and $135,300 in Norway. That's 82 percent more. The difference is way smaller for electric cars.
Come Tesla, and suddenly all the rich people in Oslo wanted one so they could bypass the commuters by driving in the bus lanes.
The rest of the nation is still very much an ICE nation. When you have to drive a half hour or more to do certain types of shopping when you live outside the cities, they are pretty much required.
On a more flatter terrain around Oslo the car could go around 150km. This is more than enough for any kind of shopping. The newer eGolf almost doubles the range making it absolutely non-issue if one gets car today.
The real reason is why electrical car has not been popular with less wealthy people is that cars in Norway are heavily taxed making one a heavy investment that one sticks to and people here are rather conservative. But attitude is changing.