I live in the US, and primarily use Imperial for units of measurement, but I wish that the US primarily used Metric, especially since almost all other countries (There are 2 other countries in Africa or something that use the Imperial system, but even they use Celsius for temperature). I know that converting units between the metric system (Converting millimeters to centimeters, as an example ) is very easy, since you just need to add or take away a decimal place.
I think it is like that for most of Europe. Don't take my word for it since I live in the United States, as I said above, but in YouTube videos for companies such as Liebherr, a German construction equipment manufacturer (They also make cranes, refrigerators, gear cutting machines, engines, concrete plants & truck mixers, and some other stuff. It's pretty impressive) I think they use commas as decimal points instead of periods.
EDIT: Nevermind, they don't use commas as decimal points. I watched a Liebherr video and it said the capacity of one of their cranes was 8,000 kg, not 8.000 kg. I was confused with a video from Mammoet, a Dutch heavy transport company about Trailer Power Assist, and it said that the modules had 1.000 HP (NOT 1,000 HP, as we would write it in the US) MTU engines.