This principle is currently widely accepted, and I would say that in guitar making it would be hard to find people who would dispute it. Interestingly, in the same times where this principle was developed, it was considered that “ornament is crime”. For now I only want to expand on how form follows function in instrument making; I will for now not get into a discussion how ornament is criminal.
On the Baglama the strings often rub on the headstock, due to how the tuning pegs are located. I felt it was important to eliminate this flaw, but without using guitar tuning machines (quite heavy and unsightly). While using what looks like a traditional friction peg, I adjusted the location of these pegs and also changed the shape of the headstock so that the string would no longer rub and mar the headstock. And also eliminate any danger of buzzing in this area.
The only way to change the design of the headstock while using veneering techniques (as outlined on my post “Light as a feather“) was to create angled and curved areas. This angling and curving can be quite ambitious, but it provides incredible strength and doesn’t insult the eye. The pictures show the roughly finished headstock of a Baglama, and you can easily see the many angles and curves.