I've been through the arithmetic with a couple different old people when it came time for them to sell their cars and stop driving. When you add up all the costs of owning and operating a car, you find you can call a cab quite a few times a year and still be way ahead. The biggest problem they had was giving up the perceived freedom.
I'm not calling anyone here old, by the way, and I hate euphemisms like "senior citizens".
I'm getting old.