That's an excellent summary, thanks!Everyone here(well except you maybe) knows that while D2 and S30V ARE premium steels, they are considered somewhat pedestrian these days compared to S90V, K294, M390, etc.
To change the direction a little, I think where a lot of folks get wrapped around the axle is that when newer and more wear resistant steels come out, they tend to get defensive about their favorites. The old steels still work as well as they ever did, it's just that others have come that work better - in that particular category or application. But yes, the old ones still work.
And with a 21st century heat treat, they can work a LOT better than people would ever expect...