The response said they're working on changing the regulations to allow businesses to only label in metric if they prefer (today, mostly they can choose between

The response said they're working on changing the regulations to allow businesses to only label in metric if they prefer (today, mostly they can choose between either traditional-only, or dual-labeling, aside from things like pharmaceutical dosages and nutritional content labeling, which are already metric-only (dosages are in milligrams, liquid dosages are often dual fluid ounces and cubic centimeters, nutrition is grams of fat/protein/carbs, milligrams of salt, etc.)). I remember in the 1970s, when highway signs were getting converted to show both miles and kilometers; I think that got stopped because of the costs (the signs have to be bigger, they may confuse people, etc.).