I think the chance of someone making a razor that matches, let's say, a 1920s german razor or a 1960s japanese razor is probably pretty limited.
(by that, I mean a japanese razor that copies a western style). They are by far better in minimal alloying, which is by far the worst in hardening and tempering in terms of dimensional stability, and then above and beyond that, the grinding and polishing is not an easily mastered skill.
I have an unhealthy fascination with sharpening everything. I got a message years ago on a razor forum from a "professional honemeister" about having trouble with an S30V razor. The razor was made like a knife, and obviously the carbide issue is well known here. The trouble with S30V or even some things like O1 at mid hardness is that a strop will cause some deflection that you wouldn't get on silver steel or something more plain (like a carbon steel with a tiny amount of mn or something similar). S30V is a no-go, but someone paid 4 figures for the razor from a custom knife maker. I advised the "professional" to use the smallest diamond powder or paste or spray that he could find, don't strop the razor, and tell the buyer never to buy a razor made of any such thing again.
It's a boring answer, but the boring plain inexpensive silver steel rod makes the best razors I've ever seen.
you have much more discipline than me. I"ve probably found many that are a match for my second razor, but none good enough to unseat it. I have one tanifuji that I found for $50 in a proxy auction on japan yahoo, also. It had a tiny chip off of the end of the razor (about a 16th of an inch). I ground it off and repolished the tip - great razor. Most of the rest of what I bought in the indulgence has been groups so that I could at least break even when I cast them off.