If there is an urgent need in having much more power in a short period of time, I would imagine someone would have to pay for upgrades. What would it cost, x2 electric bill for most of us? Maybe more. I hear Europeans pay crazy much for electricity. I do not want to pay more for something I might not use in another 10 20 years. I would prefer they made plans, clearly defined what upgrades will cost and above all who will pay. I would guess a lot of people disagree if they knew they bills would go up significantly.1) on ALL first world countries, the electric companies (= stock holders) have huge margins, at the cost of slowly upgrading the infrastructure (among many other things)
2) if you wait that the infrastructure is updated before you start with EVs, than you'll wait another 50 years. The fast adoption of the EVs demands a faster update which is easy in big cities
3) if they adopt more renewable energy produced locally, the need for an update of the infrastructure is low.
The thing is: is far easier to justify doing nothing than doing something.