The blade measurement is part of the issue. When many of these razors were made, the blades were .006. Now, they're all (but one?) .004. That's a 33.3r% reduction in the thickness, with a consummate increase in the flex of the blades. Depending on the alloy, the tempering, and the grind, there can be a significant amount of chatter and bend for certain blades with certain razors.
@rabidus, over at B&B, likes the post war techs because they clamp the blade further out towards the edge than the pre-war techs, and also prefers the late 40's TTO's over the others. (There are actual photos showing the difference in how the blade is held)
That's part of why I think that someone shouldn't just say "Oh, it's technique". Technique IS a lot of it, but there is a small amount that is lubricant, another small amount that is the razor, another the blade, and the last is the face of the user. That's why we have some people that love the Derby, and so many that dislike it. I find it no worse than the Dollar General blades, and only mildly different from the Personna 'dollar store' blades. It was -better- than the Voskhod, which seemed to go bad after the first shave, or maybe during it. The Rapira, THAT was good. So was the Nacet. I haven't found a blade yet that I can't use for an acceptable shave. It's just how much discomfort I'm willing to endure. (not necessarily with nicks or abrasions)
So, what I do is advise people to find a razor they like, a blade that works with the razor for their face, and not worry as much about the rest. I do advise to try more blades eventually, because there might be better

Heck, even if it's technique, if they find a razor that hits a good angle with their current grip, then they've found a great razor to use. Less stress for the learning curve.
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