This!^^^^
I find that at least 90% of the time I use my Opinel, I don't bother with the locking ring, just use like a slip joint with light spring. The Sardinian Resolza has no back spring at all, and is a strait friction folder. I've been using it a few years now pretty regular, with no problems. The Japanese Higonokami is also a strait up friction folder and I love the simplicity of it.
Having grown up before the Buck 110 was the new hot lick in the knife world, we all just used friction folders or slip joints, and did just fine. Locks are over rated. I think there is a couple of generations now of people that has grown up using nothing but locking blade knives, and has developed very sloppy knife handling skills, or lack of.
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