What cracks me up is when people have their lists of "super steels" and their list contains steels they've never used, or even been in the same room with.
example:
You forgot Rex 20 and Rex 121.
In addition, in the late 60's and 70's ( I grew up on a farm, and got my first real job at 13 in addition to the chores, both meant using a knife daily) I don't recall anybody ever thinking about 440C as being "super" anything. It was a steel that traded lower performance and made it more difficult to sharpen with a proper edge for corrosion resistance. It had some status as Buck and Gerber used them so it was as we saw it the best of the stainless steels but it was still inferior to us than a good carbon steel.
That's as it was for us anyway. My coworkers, family and I.
Corrosion resistance wasn't and still isn't an issue for me. Growing up on a farm you learned it was very important to take care of your tools. That included whatever it meant from fueling and oiling up the vehicles for morning to removing anything that might cause corrosion from whatever you had used. Whether it was your knife, or the underside of the lawn mower that collects wet grass that will dry and stick if not removed. In addition, every tool had it's spot so the next person didn't have to look for tools before starting work, or search for a vehicles keys ( if they had any). A dull knife was as worthless as an out of fuel piece of equipment without it's keys and with flat tires.
Carbon blades sure fit in better in that environment.