Which Leaf? Leaf 1st gen with 150km range in summer and 100km in winter and which are already decade old? Those yeah, cheap, but also useless. Leaf 2 are nothing like that. Even base model with small-ish 40kWh battery is 30k euro, and 60kWh model is starting close to 40k euro. And for that price it's a small c-class hatchback, competing with way better cars, like large and packed d-class sedans or SUVs. And charging EV on a commercial station is currently more expensive than filling up a tank of a similar ICE with 95 petrol, per km of range. The only way to charge EV on a cheap, which is possible, is to own a house and charge it on a home line at domestic rates. And owning a house in EU is an expensive luxury.

Unfortunately, infrastructure need to improve a lot before the switch may happen.