The discussion highlights the failed attempt to convert the US to the metric system, citing the Mars polar lander incident as a notable example of unit conversion errors leading to failure. Participants share personal anecdotes about miscommunication regarding units, emphasizing the potential for misunderstandings. One contributor reflects on the slow progress of metric adoption in the US, suggesting it may take another century for full acceptance. The Gimli Glider incident is also mentioned as a significant case of unit conversion issues. Overall, the conversation underscores the ongoing challenges and implications of unit miscommunication.