While the fluid dynamic principles that govern drag remain a black art in some ways, other things just make sense. This is one that is so obvious that we haven't used it. Another is that the horizontally corrugated skins on some early aircraft benefited aerodynamics. I know that some racing boats use longitudinal striations in high pressure areas; I remember when 3M was testing striated applique tapes on aircraft (and I could not get them to "loan" me some for my employer to test on RC boats); when will chord-oriented wing striations and hull length fuselage striations make it into production aircraft?
In additions to striations what about indentations, like the ones used in golf balls and some plastic kayak surfaces. The holes create turbulence in the air flow through the uneven surface creating a cushion of air whereas the friction/drag occurs between the air cushion and the air flow instead of the surface material.
More so, let’s not forget the blown flaps that were used in the Phantom F-4s and other aircrafts successfully, translating the fast airflow over the upper surface (due to the decrease in drag) onto lift.