I think there will have to be so many millions invested in generating the electricity needed that we may see the 2040 cut off be modified to a phased introduction of all vehicles being electric.
Surely the "phasing" process will start at 2040?
As I read the article, only new cars will be affected as of 2040, so the demise of fuel supply stations and the hike in electricity production, will start at the same time then.
Existing cars at 2040 will be permitted and it will take the average lifetime of a vehicle, to complete the change-over, depending on the policies after 2040 regarding older cars being permitted on the roads.
The price of alternatively powered cars will decrease as demand increases, so by 2040, one would hope that these would be available at an affordable price.
Thankfully, by then, I might have worms crawling out of my eye sockets, as I sit smugly behind the wheel of my beloved 80, buried a couple of meters below the clay... with the usual bug grin on my face, of course....
Oh, and apologies for posting this before seeing Rob's post #62 above....