Comment by JulianMorrison

Another reason things will change fast is that, like film cameras, gasoline cars have a long logistical tail. As soon as they start to fall out of favour, there's a feedback loop. Suppliers and mechanics close close. Fuel prices rise as fixed costs are amortized over fewer buyers. Gas stations are further away. You can't get the fuel or parts, who'd want a car like that? And so more suppliers close.

Even if you are stuck with a gasoline car, can you keep it running? Many of those two billion cars will end up scrap or modified with converter kits.