This is an interesting question. No doubt a multitool can be very useful as a portable tool kit for someone whose daily activities requires them, but that doesn't apply to me. Although I seldom need hand tools in my occupation (photographer), my Leatherman gets used for everyday fixes, mostly out of convenience when I am too lazy to fetch the proper tools from where they are stored. However, because of its value in emergencies, I carry the multitool just about always.
In the 8 years I have toted it, Supertool has "saved the day" so many times it has me a little spooked. That is because I never seem to have got into so many jams in such a short time period previous to acquiring it. Within 6 months of strapping it on, I got my transportation up and running three times, framed and hung a photo exhibit when the gallery's tools could not be found, experienced equipment malfunctions where the ST was the field expedient, once saving an important photo session, and even relied on it in a self defense situation (didn't come to blows). OTOH, prior to acquiring a ST, except for the occasional search for a bottle or can opener, I can't recall any life emergency that a multitool could have set right.
Although I have carried a knife since age 12, it had been as a convenience item rather than a necessity. Right tools for the job were in tool box at home, kit in car. In the military I was a mechanic, so even in the field tools were pretty much not far from hand. Likewise, for outdoor recreational activities I found saw, hatchet and food prep cutlery to have been more useful than any pocket folder. Nor was I any kind of knife enthusiast, SAK beside the point. Then one day at a sporting goods shop where I was shopping for something else, I noticed a Leatherman. Took me 10 minutes (that long?) to convince myself I needed it. At that point, my consciousness seems to have undergone a shift.
There is a custom, I have heard, that many Afghan tribesmen carry knives with an inscription on the blade that translates to: "You may need me but once in your life and for this you must carry me all your life."
Dunno. I like to think of myself as not superstitious but if I stop carrying I may reget it, or maybe if I stop carrying I won't need it any more. OTOH, it doesn't weigh much, far less than my customary bag of photo gear, for sure. On the belt, I seldom know it is there, so I only think about it in times like this.
dont ask why 
