The point is ..... Glen's post listing the various styles illustrates ... the point .... that they were modified with a purpose in mind. IMO anyway. A Spanish or Oblique, a hollow, or a spike. The round is/was probably for safety and speed while a barber's notch ..... more correctly called a hollow for maneuvering around nostrils and a French or a Spanish for reaching difficult areas more efficiently. Just thinking these various points were motivated out of a utilitarian motive rather than style.