True Metric is better for calculations.
I use grams when I cook.
but there is some intrinsic Human thing about certain numbers.
186 MPH feels so much faster than 300 kmh.
I think when numbers get to big humans can't really perceive them.
But when smaller numbers like 100 or 200 have such a huge meaning.
It has a larger impact on people.
So i do like the larger numbers.
but if I am doing small things I love grams.
When I'm driving I use miles as that's what the signs say and changing those will just confuse people. I buy fuel in litres. I run in km as it's a more manageable distance. These days I measure my height and weight in metric. I cook with g and ml.
Some of the UK government have pushed for using Imperial more (Brexit bonus?), but I don't think people care that much. Kids have grown up with metric.