There is a great difference between a minor one time registration surcharge and the ongoing $$ collected from gasoline taxes which electrics don't pay at present. The true "cost" to drive EVs is to assume an approximate fuel consumption rate for the size of car and extract the tax % $$ and add this to the cost of driving. Currently IC vehicles subsidize EV road use by nearly 100% and in the long term that happy state of affairs is not tenable.