The thing that makes the Opinel a standout is, its like the Bic pen, Toyota Corolla, Timex watch, and other things of that sort. They just flat out work. Not only work, but work well. Can you buy a 200 dollar knife that will slice with a sharp Opinel? The run of the mill Opinel fresh off a stone will have that scary sharp edge that goes right though matter. No matter whittling in wood, slciing vegetables or meat, cutting rope. Who knows how many generations of working folks not only in France, but around the world, have used Opinels over the last century and some change, to good effect.
I know from my own long experience in my love/hate relationship with the Opinel, that I may get a bit impatient with the finicky factor of them, but in the end they fulfill my love of a light weight knife in the pocket, that I can use to an extreme that I won't use a more expensive knife for, and they have always got the job done for me. Okay, I have to do some tweaking when I get a new one, but what the heck, its not a real chore messing with knife. A bit of sanding, some soaking in linseed, mineral, or other oil and you've got a pretty darn good knife. If you want to really go all out, stuff some Johnsons paste floor wax in the joint and hit it with the better half blow drier. I've experimented and found I could totally submerge an Opinel in a glass of water for 30 minutes and still open it okay. A little stiff, but its doable. Okay, it may get a bit sticky under really wet conditions, but nothing is perfect. Hell, at this point in time and for quite a bit of the past decade or so, I get out of bed in the morning and I'm a bit stiff and non functional for a bit. At least till I move around a bit and have my coffee.
The Opinel will slice and dice well above its weight class. I've yet to see any fillet knife, no matter that cost, that will do a fish like my number 12 slim. We do a lot of stir fry and Asian cooking, and the Opinel will slice translucent fish slices and as thin slices of vegetables for the wok as any of my other knives.
Opinels for getting the job done.