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It's typical of spheres. Looking at the drag vs Re graphfor a sphere, there's a pronounced drop. Scale does not matter. Other shapes do not behave that way; so there's little transfer here. I suspect that once the patch is large enough, it stops seeing improvement.
Keeping the boundary layer energised is a good thing; especially on back slopes. Cars would look funny with shark wing denticles on them.
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“Soft shapes follow us through life. Nature does not make angles. Hips and bellies and breasts — all the best designers have to do with erotic shapes and fluidity of form.” - Luigi Colani
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