Bowed instruments are very cool to model because of the nonlinear slip of the bow against the string. A bit curious why bowing was not discussed or used in the example of a violin, just plucking. Do luthiers test violins more by plucking than bowing?

They briefly address this in the article:

> Violin bowing, the researchers say, is a much more complicated interaction to model.

It's probably harder to model and the results "aren't quite there yet".