Having a car would definitely be convenient if you want to do some impromptu visits around the city to take a break etc. I don’t have a car and during holidays like Christmas etc, Car rentals are sold out and I literally am dependent on my friends who own cars in such times. So if you think you can afford it, I’d say keep it and cut down parking cost, get a low maintenance car or something else if possible. Another problem is that you won’t think twice before going out for silly things when you have car, but in case of rentals, sometimes you might double think on the worth of spending 100-150$ on a day’s car for it. You can still easily survive here without a car, but will need to pre-plan outings, rental car bookings etc.