Thank you, this is valuable input! I had considered the Leek a minor upgrade from carrying an "Olfa cutter" (disposable razor tips) for light duty, but did not contemplate the breakage issue. That's serious.
I wonder if that description of the folder could be applied to the ZT 0770CF, or if you think it's too thin to get much done.
Here's where the definition of "carry" has to get adapted a little. Any decent 4" fixed blade's going to be about a pound, plus holster, and a foot long. Unless you're really into doing the mountain man thing, "carry" becomes the nearest vehicle and/or secured in a backpack. (I wonder if a JYDII folder would be strong enough for this duty, yet light enough to be carried on your person, generally speaking.)
Well, I downsized from a GMC Yukon a couple years ago on the premise that there was about 2 tons of steel I was hauling around that didn't get used on a weekly or monthly basis enough to justify. (I actually had a 370Z for a couple glorious years after, until my wife made me give it up. ;p)
Similarly, in the knife world, I don't think I'm ever going to need to cut a car tire. Maybe a seat belt, some day. As far as the kitchen ... we have a lot of Shun Classic purpose-built blades that are really thin and sharp, plenty for any meat or fish clean enough to bring into the kitchen.
I see the ZT product line as having a bit of elegance, if you will. You, OTOH, who uses knives a lot more than I probably ever will, think they're dainty (if you don't mind my paraphrasing). Am I getting this right?