Interesting. As an European living in the US. The only US units that I find useful are cups, teaspoons and tablespoons. And that's only for cooking. It's way faster to measure volume than weight (although less accurate)
As a pretty experienced American home baker I don't understand how you can assert that it's faster to measure volume with cups or etc. than to put a bowl on a scale and simply pour stuff in, measuring everything in grams. It's not even close in terms of speed, convenience, _and_ accuracy.
It is indeed not even close, but not in the way you are asserting. It takes a second to dip a measuring cup into the flour and level it off. So if I need 4c of flour, it takes me about 4 seconds. Meanwhile, to measure with a scale I have to slowly, carefully pour into the bowl so that I don't overshoot the amount I'm going for (and then then sometimes I overshoot and have to try to scoop the ingredient out a bit). Volume measurements are damn near an order of magnitude faster than weight measurements. And it's not like the extra accuracy from weight measurements is actually that important 95% of the time. Baking is not that precise, contrary to popular belief.
Welp not much I can say to that or to RandallBrown's response, seems obvious our experience and way of thinking is pretty different on this matter.
(EDIT: Also fwiw I often use a spoon or whatever to scoop things into the bowl, vs. pouring, which means I have more control but can still offload the measuring part to the scale...)
Whatever gets the delicious baked goods in your mouth I guess
Maybe it's my skill with a scale, but it's much faster for me to scoop a measuring cup or spoon into a container and scrape off the top than it is to go back and forth adding/removing stuff on a scale.
It used to be based on relative size, so if you have a set of spoons and cups and use the same for all measurements they are ballpark right for your recipe (and some minor difference accounting for user error). These day's it's defined anyway in both metric and imperial. As soon as you start weighing something from the recipe it goes out of the window as that defines the rest of the relative measurements. For that reason I really dislike the recipes telling you to measure teaspoons of spices but grams or ounces of flour. I don't have two sets of measurement cups available. These days most cooking sites mention both though.
On a sidenote: an ounce is 100g here and a pound 500g. Mainly by being in common usage and translated to common used weights. "An ounce more okay?" is an easy way to sell more without mentioning how much it actually is in numbers.
The validity of relative measurements in recipes starts to break down as soon as eggs are in play, which are not easily subdivided. On the other hand, that rarely matters and most recipes are fine with up to one more or less egg.
