We "temporarily" went down to one car during covid. We figured at some point we would have to buy a second vehicle again, in reality once we made the adjustments to a single vehicle we realized we could get by with one. When I drive to work I drop my wife off and pick her up, then we mix in transit, adjust/coordinate schedules, shop local, motorcycle, bicycle.... This saves us easily 7K a year after taxes, WELL above 10K before taxes. Be it payments, depreciation, TVM, repairs, consumables, insurance etc.
We were convinced we needed two, turns out we didn't once we forced the situation and adjusted--I bet this is the case for many.