In interests of full-disclosure: As I've posted before we have one family car which my wife "inherited" from her disabled sister. When that came along I sold our previous 14 year old family car as we certainly didn't need two. I've tended to view it as "her" car, because I like to think I'm somewhat car-independent due to primarily biking or using public transit for work and a lot of my errands, but I do drive the car more than I like to admit since hey - it's there. It's a large-ish 2002 Pontiac Montana minivan.
We're also pretty car-light as a whole family, in that we have three somewhat grown kids at home 18-23 yrs of age and two of them haven't even bothered to get their driver's licenses beyond G1 (beginner). They can get wherever they want to by foot, bike or subway.
But a month or two ago, my elderly mother gave up driving at 85, leaving a perfectly good low mileage 2001 Volvo V40 in the parking lot, so upon her offer, and with my support, my daughter has flown out to Winnipeg to drive it here.
In the short term, I'm going to get the other kids to finish getting their licenses since I think that is important to have even if you don't intend to drive much. This will partly be the "kids" car to use for their own errands etc, and if one of them moves somewhere less favourable for car-free living, they could take one of the vehicles.
Failing that, my plan, which my wife doesn't yet fully buy into, is to ditch the Montana in favour of the smaller, more fuel efficient Volvo, but we'll see how that goes.
At 2 cars for 5 (potential) drivers, we're still at the low end of the spectrum, but it is a bit unexpected to be moving in the "wrong" direction for the moment.