> calories and price per 100g on the label This is huge. In a way it doesn't matter whether the units are horsepower-seconds and farthings per cubic barleycorn

> calories and price per 100g on the label This is huge. In a way it doesn't matter whether the units are horsepower-seconds and farthings per cubic barleycorn or whatever, as long as they're consistent. But conversions are so much easier in metric that it ends up being a win for that alone. "recipe says 250g flour... I'll buy a 1kg bag" whereas the imperial equivalent requires you to know a long list of conversions between random units. As well as sometimes density, other times the "normal density" or something. That way you can buy a 1lb bag of flour to get 2 1/2 cups (or whatever, I have no idea how many cups of flour there are in a pound).