I got into the habit about 35 years ago, when I was driving a 2 WD Toyota diesel pickup, wonderfully economical but gutless driving up the 1650' vert slope I lived on then every. It was dead weight, maybe only 30 lbs., but do it twice and that's 60 lb.s, do it for a year and that's a bit over 5 ton. In all my running around local, say within 50 miles, in the last 30+ years, I have never been stranded by a flat tire, not once. Even if I were, I'd make a phone call and get picked up or whatever. Now when I was really out in the boonies, on purpose, I'd throw in a spare, as I always had one at home ready to go, so we agree I guess, carry a spare when really out there. For day to day local driving, even though I now only live 1200' up the spare stays in the garage. i do carry one of those little cheap 12v compressors though, and heck my Prius never even came with a spare, just a patch kit.
Superstition may enter into it also, maybe if I started carrying spares, I'd have tire problems, maybe if I started wearing a helmet flying I'd....... One good thing about getting older, you can back up some personal hare brained idea when called out on it by others, by stating how long you've been doing it with no repercussions, that's me and spares, and helmets, and a hell of a lot of other things. I guess I am too set in my way to change

I do wear a helmet mountain biking, and it has paid off judging by the nicks and gouges in it
