As an EDC, I have a Spyderco Caly 3 with Carbon-fiber grips and a laminated ZDP189/420 blade. This replaced an earlier Caly 3 with ATS-34 blade and G10 grips. It does hold an edge better, but it is harder to sharpen.
I also have multiple first aid kits, and every one has a SAK "Climber" model. I've found the bootlace tool to be a real finger-saver when dealing with climbing boots, and the ability to store a micro screwdriver inside the corkscrew has saved more than one pair of glasses with a loose screw.
I used to carry the SAK everywhere, but fasteners evolved and I found I had to open panels for inspection, on short notice, and the SAK just didn't have the right bit. So I now carry a hex bit/driver kit in a 1911 mag pouch for various screws and the Spyderco Caly 3 to deal with cardboard boxes and rope, leaving the faithful SAK in the first aid kits.