> The ribs on the handle of a knife are skeuomorphic of the vines wrapped on the hand end of a sharpened stone.

What? No. None of that. Even if vines wrapped around a sharp stone were ever common, no one alive today (outside an uncontacted tribe maybe) is "familiar" enough with them to make a difference.

Texturing handles is just an obvious mechanical thing to increase grip that probably gets invented every time someone makes a handle from a smooth material.