I agree with Mr. Levine. Properly heat-treated, 440A and 440C are both outstanding steels for the real world. Despite owning knives of more advanced and exotic steels, I often (especially in these searing East Texas summers) still carry knives with these blade steels. My favorite steel is semi-stainless D2, but in this humid climate, blades of that steel develop bad rust spots, which can't be removed without further damaging the finish. I rarely, if ever, had this problem with the 440 steels. While management at the old Schrade company told me that properly heat-treated 420 High Carbon was at least as good if not better for using knives as the 440A from which Schrade Plus blades were previously made, I still prefer the older 440A models.
I was at a knife show in Mesquite a few years ago, and a retired "grand old man" of the production knife business was there as a consultant, manning the booth of one factory producer of some renown.
I talked with him about 440A and 420HC (which most of the production firms went to because it cost maybe a third or less per pound of 440A), and about how knife company executives assured me 420HC would perform as well or better than 440A.
He swept his arm, taking in the entire floor of the major regional show, and told me, "The average person here could not tell the difference in use between 440A and 420HC. But you and I can. . . ."