Fair point. IDK. I just think it's critical that the last part of the saying be highly unexpected. I mean, if it starts with "The first 90% of the work takes 5

Fair point. IDK. I just think it's critical that the last part of the saying be highly unexpected. I mean, if it starts with "The first 90% of the work takes 50% of the time ..." how do we maximize the unexpectedness of the punch line? Cargill's original formulation, as Cletus quotes from Wikipedia, is best, I guess.