It was SAK's that made me drift away from all other knives in general. Over the years that I was a bonafide knife nut, time and time again I had need of a SAK, and so always had one in my bag, or in the glove box of the car, or in another pocket. Time and time again, the SAK saved me from some situation where nothing else would do because of the tool capacity. A conked out Vespa motor scooter on a dirt road a long walk from anywhere, a control grip of a electric trolling motor on a canoe come apart at the far end of a long and winding lake with a long paddle back home if I don't fix it, a conked out motor on a boat out on the Florida Straits, all situations where a dedicated knife would be as useless as tits on a boar hog.
As I went though the aging process of life, I just wanted to be having less stuff in my pocket. I grew more to appreciate the freedom of Maximum Minimalism. The freedom of having what you need with you, but not being weighted down. A lot of my love of this approach is rooted in my love of backpacking, but being partial disabled by some service related injuries to my right foot and ankle, so needing a cane and a very light pack. Under 30 pounds, more like 25 pounds. I needed to go ultra light backpacking if I was to continue my love of getting out there. Cutting corners like a monocular instead of even compact binoculars. A SAK in the pocket instead of a large locking blade folder that has less capability. Selling off the Randall 14 that had been my woods knife before the construction accident while serving in the army engineers. The big fixed blade was a ridiculous piece of gear, I just didn't realize it before.
Later, being married with children, the SAK became indispensable. With three small kids, there was a need to 'fix' something every single day. Small battery compartments needed to be opened, toys fixed, meals made on the run while out someplace. Hungry kids are an instant demand. The SAK opened cans, popped off bottle caps, sliced small dinner rolls for on the go sandwiches of deli meats or cheese. SAK scissors snip off straws that are too long sticking out of the sippy packs, or cutting open plastic packs of something for the kids. As the kids got older and learned to fish, there was a need for a small sharp knife by the river bank. There were splinters to be plucked out of little fingers, bandages to be trimmed out of the gauze pads for all the scrapes and owie's from playgrounds.
After is was all said and done, two of my three kids are devoted SAK carriers with no interest in any other knives. My Daughter, Jessica, carries a classic on her keys, and she is a fanatic. Won't even consider another pocket knife. My son, John, is as much a fanatic as anyone. He travels a lot for his job, Europe, South America, and has a classic that travels in his checked bag. Just too handy to go without.
Looking back on it all, I can say with total honesty, I never had need of any other knife for 99% of what I needed. Occasionally, it will be messy, so my old Buck 102 woodsman will clean fish, do camp cooking, where a folder would be hard to clean under field conditions. Any small fixed blade like the woodsman, a Mora, or even a Victorinox paring knife in a sheath would do. But the SAK in a pocket or on a keyring, will do for most of what people in urban/suburban environments will need.
My only regret is, that it took me so many years to drift away from the knife nut silliness.