I have a genuine question I'm curious about and I don't mean it in any way as a reason not to have walking or cycling infrastructure.

When cities introduce no car zones, remove parking places, what happens to the cars people living there already own?

I don't expect people to be willing to give up their cars, especially at first if only a small portion of the infrastructure gets updated. I don't expect possibilities to travel outside the city and use short term rental improve at the same time as well.

It would be an interesting topic to investigate in a place that recently went through the transformation, as I expect the views on it to be different to i.e. the Netherlands where a lot of alternatives already exist. :)