I have 1l milk and 1kg flour. My recipe wants ⅜ liter milk and 150g flour. 375ml is a bit odd but trivial ultimately, and very easy to measure when I just pour 375g into my blender on a scale.
Now how would imperial cups deal with 150g from 1kg?
I also have 45g oil, what odd measurements would that give when you try to divide it up without a single decimal number?
Try 24g suggar.
I'd love to see all that converted to imperial.