S30V has had its problems in the last few years, leading to the introduction of S35V....I prefer CPM154 stainless over either of those. Sharpens well and holds an edge forever.
What would you say is problems with S30V? S35VN pretty much mirrors it. Yes it has a few very very small advantages to a degree.
I like CPM154, not to be confused with it's mirror 154CM, they are all for the most part the same as VG-10 and ATS-34. Yes the process is different and it does yield a few benefits.
Bottom line is Proper Heat Treat and Edge Geometry will trump all others not so properly done. I wouldn't say no to a finely made knife in any of the materials you listed including carbon.
Agree with every point you made.
S30V was accused of “micro-chipping” on the cutting edges of finished knives a while back. Whether it’s fake news or not, I have no idea, as I don’t use that steel. You can Google S30V problems and it comes up. S35V was brought out to correct the issues I’m told. Man, you mention it in discussion and the battle lines get drawn in a hurry! No middle ground there.
CPM154, 154CM, ATS34 are all the same recipe, just different manufacturing methods. ATS34 obviously made in Japan, with the others made here. I very much prefer CPM154 because numerous times I’ve had inclusions in the ATS34 finished product. “Dirty” steel. Plus, the CPM process will more evenly distribute carbides throughout the blade. Without writing an epistle on the process, the Crucible Particle Metallurgy process results in a much better blade.