I had a simple one as a kid. It had scissors, large and small blades, bottle opener, can opener, corkscrew and that pointy little scraper blade that someone told me was for cleaning pipes. Didn't even have tweezers or toothpick. Nor a tiny flat head screwdriver that screws into the corkscrew but I got one later for it. Then less than a year after I got it, before the new knife excitement had gone, a mate borrowed it at a scout camp to use the scissors and handed it back with the spring sticking out saying he'd fixed it. Turns out he'd seen the bent spring steel that flicks the scissors open again and had spent about 10 minutes straightening it!! He was a good mate so I only gave him a piece of my mind, which despite being brought up never to swear did result in a blue tinge to the air. I have never liked SAK since then. I even tried to replace the spring. A local shop sold all different sizes so I matched one as close as I could get and the damn thing wasn't right.
So I solved the situation the only way I know how... I bought a cyber tool SAK!! The Swiss Chanmp and the cyber tool are about the same size and probably have the same number of tools but I figured I'd use the cyber tool more. Turns out I use it a lot more in the first year of owning it than I used the original SAK in probably 25 plus years of use. Whenever I needed a pair of pliers out it came. Same with flatheas and philips screwdrivers. I just found it more comfortable to use than separate tools. I've just lost it too after an overnighter so I'm a bit ****** off with myself right now. Might have to get something else.
Anyway I still have my first SAK. It was my second ever knife. My first was a birthday present when about 8 or 9 and lived with me in my pocket all summer long after that. I must have sharpened all the twigs in Devon that summer. Then the SAK ws a Xmas pressie at about 11ish. I played with it all Xmas and New Year hols. Certainly more than my toys I got. When I say played I meant opened and closed the different blades not played as I was fairly responsible with knives.
I can recommend the cyber tool as an excellent house SAK. Well day to day use that is but perhaps more workshop and home/office use than in the wilds.