I've had a SAK (only ever a Victorinox) in my pocket pretty much every day for the last 25 years (back then it wasnt such an issue for a kid to carry a knife in school, in fact my CDT teacher taught me the value of stropping the blade using the palm of the land was his recommendation, a little dodgey perhapse, but it works) they have been part of my everyday apparel for so long now I feel undressed without the familiar weight in my pocket.
If memory serves the first was an 'officers knife' - lasted a few years before it got lost. Since then its always been a 'champ' I did have the survival kit for a while, but the pouches back then were not that good, and it fell apart pretty quickly, so the knife went back in the pocket, and the pouch in the loft (where I think it may still languish)
A couple of years ago I added a spirit multitool to my belt and that has become a pretty permanent fixture as well. The ratchet has proved very useful and tougher than its size may imply.
Combining the both there arent that many jobs that pop-up that cant be performed with a little ingenuity and patience: Ive taken the tops out of trees, and built tree houses, and as time has moved on, repaired cars, built model helicopters, repaired fishing rods, built computers, cleaned and skinned small game and gutted fish - Hell I've even sharpened a few pencils
Granted the blades don't hold an edge that well, but there is something rather therapeutic about putting a decent edge on a blade, so for me doing it regularly is hardly a negative.