Of non-trivial relevance here is the ongoing cost of the failure to address the metaphysics of dimensional analysis in the foundations of mathematics hence computer programming. Those of us like John Walker who have taken seriously the problem of engineering computation always end up focusing on this fault in the foundations of programming.
The loss of a Mars Orbiter may be one of the more prominent examples but the loss of value on a daily basis to this fault is undoubtedly one of the greatest hidden costs to the age of Moore’s Law and beyond.
PS: As Natural units frequently come up in this context I wonder what would happen if the Planck mass were a basis rather than say the electron mass.