[hat_man]

I guess in a sense that’s my point.

If the evolution of tubercles is good (and aero and fluid dynamics being similar) then why don’t we see the same evolutionary process on “air creatures”? My assumption is that this evolution benefits only “water creatures” and not “air creatures”. And, somewhat by extension, this particular type evolution isn’t a benefit for vehicles that move through the air.

There’s always the exception to the rule (possibly insects with an exoskeleton), but if it doesn’t benefit birds, bats, etc., then how does it benefit vehicles?