Well, I've just had my first challenge. My son went out of town and needed a cat sitter twice a day.....I had planned to ride but it's been raining hard and super windy. So I walked to the Bart station, rode Bart, then walked to his place. Twice yesterday, twice today, one more time tomorrow a.m. Just about 45 minutes each direction. I pretty much consumed the entire day, what with coming home to take care of MY dog in the middle, but it got done with no car. Can't say I didn't have thoughts of renting a Gig car for one of the trips or calling an Uber, but I wanted to see if I could stick to biking and public transit. Conditions were not quite as bad as it ever gets here, but close, so it gave me some added confidence. Other than that, I haven't missed my car or even thought about it =).