Aging parent here. I moved into the city, walk and cycle nearly everywhere, and plan to sell off the car in a few months. My parents both drove until their late 80s, and that's not something I intend to do. You could have a large number of taxi rides and car rentals and still come in well under the annual running costs of a car, including depreciation. And your reflexes and situational awareness don't improve as you get past 70.