Not listing alternate units second, not converted on screen, not called “freedom units” and not hiding behind the excuse of “most our audience is in the US”
Mostly thinking YT channels like Wendover, Bluejay, sometimes Practical Engineering and even some European ones like TLDR News
The difference between a meter and yard is less than that of a measured vs “eyeballed” yard and everybody knows what 0 C and 100 C are so the learning curve is also massively (by at least 50 kg) exaggerated
Metric construction doesn’t start with 10cm or 100cm as a basic size. It uses a 600mm “module”. Dimensional lumber pretty much aligns with US sizes, not powers of 10 in mm.
And, are you telling me you can find an exact 1/3” on your ruler?