We've had different mil definitions in Scandinavia before, but at some point Sweden and Norway agreed to unite at 10 km, which is a really useful unit. Denmark just didn't do it. They'll give distances in hundreds of kilometers.

I love this! Let's use all the prefixes!

It's always been a pet peeve of mine that Sweden is seemingly the only country that uses dl (deciliter) and hg (hectogram, but we just say hekto, just like with kilo), which are to me vastly more useful units as they're close to what you're measuring. 2 hg salami or candy or whatever instead of 200 g, and 3 dl water instead of 30 cl or, god forbid, 300 ml.

I see cooking shows from countries that normally use imperial, using metric by measuring everything in milliliters. It makes no sense! No recipe needs that resolution.