And bit by bit, they start to build their own confidence so that they feel that they can go out themselves, they start doing it together as a little group.
And so, what's likely to happen is that, little by little, we will get in the habit of letting go of the steering wheel, until one day, all cars, even here in the French capital, drive themselves.
You could say that prices have gone up bit by bit until it reaches a tipping point, which might be where people can't afford to buy basic things, for example.