Maybe instead of building it into the knife, it needs to be something you could attach to any knife

Interesting idea, but I would say that it is orders of magnitude harder compared to having an integrated system. Vibration in such a compact space with a very sharp blade... I want this system be stable around me.

I would say, if this idea becomes popular, knife producers can create their own versions in the new models, or retrofit old knives at the shop.

That's a pretty good idea.

If this was a small 40$ attachment you could put on the dull edge of any knife, this would be great.