A spare has saved us a few times, and I like having one because flats never happen in convenient places or times.
- On my way to work, before dawn, on a private road, had a sidewall blow out in a car that didn't come with a spare. Would have been more than an hour just to get a tow out, then another couple hours waiting on the repair. Threw on the aftermarket spare I'd bought in about 5 minutes, got to work on time. Dropped off the tire over lunch to get it fixed, picked it up after work.
- Wife herniated a tire one day. Again, putting the spare got her home.
- Had a nail in the tire on a trip to Orlando. Discovered it in the driveway of our Airbnb early on a Saturday morning. The spare got me to wally world to get a plug kit and back in time to fix, air up, and reinstall the tire before my wife had to be at her 0830 event.
- Similar thing happened at home, when wife was out somewhere. Was able to go out and get it fixed before she got home,
I also use the spare while rotating tires, since I don't like leaving a car up on jackstands (driveway has a bit of slope to it). Jack, remove first tire, install spare, downjack. Work around the car removing and installing one tire at at a time. Come back to where the spare is, jack up, remove spare, install last normal tire, downjack. Put spare away.
Plus, I just can't stand having to wait for someone to do something that I could do myself. For example, I have a whole pile of tools at home (and some leftover parts). Wife doesn't understand why I don't "just" call someone; I can generally knock out most home repairs (plumbing, electrical, etc) myself, including the trip to Lowe's a couple miles away, before the contractor would even show up. Having a spare means a lot more confidence that I won't get stranded somewhere out in the country or early morning, waiting hours for a tow truck. I've had to wait for a tow twice due to the car just being totally undriveable and it's a terrible feeling.