I am an inexperienced wood carver, but I have accumulated a good number of vintage carving gouges. IMG_0634.jpg
Old tools seem to pile up on my workbench.
A lot of these tools came from two estates, one a violin maker and the other a sculptor.
In both cases about 1/2 of their shallow gouges #6 and below have fingernail profiles.
This seems counter to the advice given on the internet, recommending a straight 90 degree profile for all the gouges.
What am I missing? Is instrument carving that different from general wood carving?

The two gouges on the left were the violin maker's, and the two on the right were the sculptor's.
The two in the center are straight profiles for reference.