As I said earlier in this thread, I like and use both one hand opening knives and more traditional designs.
However, I've got to admit a carbon steel slippie ages better than a more modern one hand opener.
About "real" knives. I work as a wilderness guide, mostly long horseback trips through the mountains, I worked as a hunting guide for a few years and I'm a volunteer for the local mounted SAR unit. So my knives get as much work as an outdoors knife can get, SAKs and Opinels have held up just fine. And trust me, when you're giding a group of five with eight or ten horses/pack mules, you don't always have the time to look after your knife as much as you'd like, SAKs and Opinels have dealt with that just fine as well.
Hell, I took my SAK up a volcano in the Andes when I was working at an archeological dig, it worked so well that my One Hand Trekker stayed there as a gift to a co-worker.
I went through a SAK rejection phase when I first started learning about the new wonder steels and cool locks, but their sheer usefulness got SAKs a permanent place in my pocket.