Part of the point of the prior post for everyone to consider sharpening is that the edge is created and there are marks near it, but treating the edge itself at a steeper angle prevents wasting time ever removing them as a separate step. The fineness of the edge is absurd, but unwinding sharpening beyond just creating a burr and taking it off (to making it fast and practical) is a hobby that fits well with making.
There is a point where a sharp knife is no longer really a safe knife for others, but not everything we have or make has to be out for public use. This knife is past the point of adhering to "a sharp knife is a safe knife", though.
What's described here is similar to the whole unicorn concept, but the concept isn't original - it's everywhere in parts in real life before everyone wanted to dumb down sharpening or create platitudes (perfectly flat planes). It's nice to see that both hasluck and holtzappfel went to some detail to describe the importance of setting things up to treat only the edge.
The brightening in the picture above shows that there is a radius at a very small scale (thousandths). That makes the edge resistant to deflection without turning it into a blunt rounded large pile of doo. Just as would be the case on a plane or chisel or carving tool.
The same edge that does that, then also does this (cutting sticks like carrots).
(I made a second banana video - some guy thought maybe I was throwing it. Could've been a girl!) . Camera is laying on the edge of the counter, so 2 feet is probably about right. Banana on plate today, too!!)