If S7 has poor edge retention though I would hate to see what qualifies as good.
I don't think Vox said SR-77 had poor edge retention. Just that SR-101 and INFI are better.
Keep in mind that SR-101 and INFI are both VERY good at edge retention.
SR-77 has still shown to be good in edge retention.
There are quite a few steels that seem to me to have better edge retention than SR-77. They just tend to have to be harder and not as tough as SR-77. Often, many other steels are much harder to sharpen and get sharp initially as well.
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