system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 - Why doesn't the USA use the metric system?

I've been pondering this for years and realized Reddit would explain it to me. It makes no sense why we use inches, feet, miles and even a different degree scale when it seems like the rest of the world uses the metric system.
gpt
Semi-related: so much of our manufacturing and business is tooled to be done in imperial that the cost of retooling every machine and retraining everyone to start using metric would be astronomically high. So we stick to imperial and smash up a Mars rover every once in a while.