Is an SAK all you need for general EDC uses?
In a nutshell, yeah.
The big difference is that we, those of us on this knife based forum are not the regular joe. We are the obsessed, the knife knuts. We're like the car nuts, the bike nuts, or all the other affictionado's of a cult worship item. If you look at the rest of the non knife obsessed world, some get by everyday with just a basic ask, and a heck of a lot of people don't even carry a knife these days. Lets face it, in modern day life there's a little need of much knife for most of us. Not many of us are homesteading in the Alaska bush country, or dropping into enemy territory on a high speed black ops mission. For most of us office workers, factory workers, a SAK will open the mail, UPS boxes, slice up lunch, dammed plastic blister packages, or whatever. Even in the building trades, there's not really much need of a knife, and most construction workers now carry a folding utility knife like a Husky, Stanley, or Super knife that uses replaceable blades.
But for us, we have to have the latest shiny sharp that catches our eye, and we're never satisfied for long. The search for the perfect knife goes on long after any sane person would be happy with whatever is in the pocket. And since the largest knife company on earth is Victorinox, Making more SAK's every year than any three other knife companies, they must be enough for most of the rest of the non knife knut world.
A SAK makes a fine edc.