EDC'ing a fixed just doesn't really happen in modern life, especially if you have a job in the public eye 40 hours a week.
Fixed blades do offer strength, but only for a very few applications. A knife cuts, and in modern life, their are few things a 6 inch blade does that a 3 1/2" blade can't touch.
Folders are a lot more prone to utilize superior technical materials, treatments and methods of construction. There's not much real life call for it, but you can buy a lot more titanium framelocks with high speed steel blades than titanium fixed blades with high speed grips.
If your new coworker wants to show off his old Schrade clip lock and asks to see your Benchmade Vex, it doesn't rate a second look from passersby. Try that with a Rat-7 and a Randall #14.
Folders are where it's at daily.