"I hate to seem impossibly contradictory here but there is no such thing as too sharp"

I've got a diamond microtome at work that you might want to try then. It's beyond scary sharp. Accidentally touching the blade will result in stitches.

Seriously though, there is a level where things can be too sharp to be safely used for their intended purpose. .25 micron is about as sharp as I'll go on a razor and I prefer the feel of .5 micron CrOx. YMMV