In my opinion the primary characteristics of a knife (especially a folder) is that it is a tool to be used and that it should be easy to sharpen and to hold an edge. To require extra care to prevent rusting should have no bearing on the steel used. The best steel with these characteristics is carbon steel. In my opinion stainless steel has no use for a folding knife. To me the plethora of stainless steel knives is a disgrace. All or most of the vintage folders and other knives were made with carbon steel and they were not expensive. Now, if one wants to acquire a carbon steel knife, he must pay a ridiculously high price. Personally, I think this situation is unacceptable. Who among you agree?