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)
(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
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.
1 US cup is 2.37dL.
Otherwise, a metric tablespoon is 15mL and a teaspoon is 5mL.
In the US, you buy measuring spoons that have specific sizes (1tbsp is 1/2oz, and 1tsp is 1/3tbsp).