It really depends on how easy and expensive it is to rent a car last minute.
Also depends on where you live.
When I lived near Central London I ended up selling my very nice car and started cycling because almost all the nice places to go out to were more easilly reached by public transport (plus you could get piss drunk if you felt like without risking anybody's life driving back like that).
Sure, you could use a car to go out to the countryside, but given that it took almost an hour just to drive out from London, it wasn't worth it to do on impulse and to do it for vacations I could just rent a car (or, even better, fly away to a country with better weather and rent a car there).
In practice what was happenning was that I was paying around half the value of the car every year for renting a garage and car insurance whilst I only used the car maybe once every 2 months, which financially was incredibly dumb, so I just sold it.