The article can as well be “Why Pencils are XYZ” where XYZ depends on the country. Once a product is successfull, the original manufacturer and their competitor

The article can as well be “Why Pencils are XYZ” where XYZ depends on the country. Once a product is successfull, the original manufacturer and their competitors just continue to copy the attributes of the sucessful product until people can no longer imagine the same product with very different attributes. That is why “Why pencils are yellow” makes sense only in the US, while people living elsewhere are saying: nope, not where I live.