I saw a post by someone who grew up with the metric system but has problems using units that aren’t used much outside of science classes (like Kelvin and m/s). This made me realize that my own skillset with metric is probably so science-focused that its probably not that similar to that of a normal person who grew up with it. I can picture a m/s (or even a m^2/s) just fine in my head but I cant do that with km/hr because I don’t use metric for driving unless I’m in Canada.