> To charge these, one would need something like 1MW charging per every 4 cars
This is massively overestimated. 250kW per car is great for fast charging on road trips but for overnight charging it would be enough to charge a car 30+ times in a single night. 3 to 7kW is more than enough. The grid for that is already there and the chargers can even coordinate to not exceed maximum power if everyone plugs in at the same time and draws the maximum. Almost no infrastructure in the town will need to be changed, the existing grid that supplies all the houses will be enough. After all those cars are owned by people that have electricity at home and are practically not using it while they sleep.
This is massively overestimated. 250kW per car is great for fast charging on road trips but for overnight charging it would be enough to charge a car 30+ times in a single night. 3 to 7kW is more than enough. The grid for that is already there and the chargers can even coordinate to not exceed maximum power if everyone plugs in at the same time and draws the maximum. Almost no infrastructure in the town will need to be changed, the existing grid that supplies all the houses will be enough. After all those cars are owned by people that have electricity at home and are practically not using it while they sleep.