Norway's been working on this for a long time - tax on fossil-fuels cars is eye-wateringly high (a base spec 1 litre VW Golf will cost you north of £35k, VW sells the ID3 for virtually the same price), and they've had non-financial incentives for electric cars - for example, you used to (not sure if you still do) get free parking, free ferry travel and best of all could drive in the bus lanes in Oslo. I think they've scrapped the free ferry travel since the Reuters article was written (2018) though as the demand was so high.
One of my former colleagues took great pleasure in driving his Tesla model S down the bus lane in Oslo during rush hour.
Oh, and the taxes on fossil fuel are as high as ours. Put together as a package, it would have been an exercise in insanity to buy a non-electric car in Norway in the last ~5 years or so, especially when they often cost more than electric cars to buy