First, for those following the thread, ANPR is
Automatic number-plate recognition.
Yeah, even with the ban on new internal combustion cars, it will take some time to change over the existing ones. It will be interesting to see how these changes affect the price and availability of gas, thereby slowing or increasing adoption.
For instance, if a lot of people are buying electric cars, gas station operators will have fewer customers, and may need to raise prices to make up for the shortfall, since their business runs on very slim margins and depend on selling volumes of gas and snacks. This may increase the speed of the fleet turnover to electric considerably.
Each time a gas station needs to raise the price, they encourage even more to go electric.
One could also imagine that lower demand might mean greater supply, thus lower prices. For a number of reasons, this scenario seems less likely, because there is only so low you can go, and it would only slow, not stop the changeover.