I'm not sure. Don't underestimate the power of inertia. I bought an EV last year and it's definitely been a "good idea" for me. Luxurious ride, fuel costs a tenth, doesn't stink. Seems such an obvious upgrade it slightly confuses me take-up hasn't been quicker among people who like me can charge at home.
> it slightly confuses me take-up hasn't been quicker among people who like me can charge at home No big mystery: a) most people keep cars for 20 years or more, b) most people don't buy new cars - they're too expensive.
b) You can also buy used EVs. I bought one last year, 2 years old, for 56% of the original price.