[slothtrop]

> If we give every person a car to drive every day, today - that's enough to make it unsustainable.

Leaving aside that we aren't, sustainability necessarily implies perpetual increase. This hypothetical doesn't make sense. If the demand were there to supply everyone with a vehicle, we would, the materials are there. That would of course result in environmental encroachment, but not indefinitely. Plus vehicles on the road will all be EV in the coming decades.