You never notice a contingency plan unless you have an emergency, then you're glad for it. My last flat was some 20 years ago, on a cold and light snow morning on the way to work. Glad I had a spare tire. I frequently drive to bicycle paths a significant distance from home. Having a spare tire [donut] is comforting in event my car gets a flat enroute, or returning home. Whenever I buy my next car, spare tire will be a factor in the decision process.