agreeI used to lose knives occasionally but I started taking the clips off and bending them a little more to add tension. When there is enough tension the pocket clip will make a positive “snick” as it slaps the scale when drawn. I started doing this over 15 years ago and haven’t lost one since. I carry a knife every day unless I’m flying commercial.i carry a kershaw everyday and when I camp. They are light, I dont even notice it in my pocket and they have a very nice quick opening mechanism. They are pretty sharp, and last a long while. I tend to be clumsy and forgetful and have lost a few knives. The Kershaw knives are reaaonably priced so if I lose it (which I have done a few times), it doesn't break my wallet to replace it.
I also keep a gerber multi-tool in my truck, and I carry a leatherman skeletool on hikes.
Traditionals are another matter. While I like the idea of them they usually fall out of my pocket if I sit on a couch or such so I don’t carry them often.