One of the things I like about Europe is use of metrics on roadways. The conversion is relatively simple in the kilometres to miles direction. 100 km equals 60 miles.
If we're traveling a long distance, it's easy to determine how long it will take us to get there. Averaging 100 km per hour (60 miles per hour), a distance of 350 km will take us about 3.5 hours.
Also, calculating with kilometres makes it seem like you're covering more ground in a shorter time.
On the golf course, I'm less enamored with the use of metrics. I've played for 50+ years and therefore memorized how far I hit each club ... in yards. When confronted with a distance to the green in metres, I have to do the mental calculation -- not that hard, roughly a 10 percent difference. 100 yards is about 90 metres, etc. But I'm never quite sure because my golf clubs, too, are used to dealing in yards.
Also, it's deflating. Seems like I'm not hitting the shots as far as I used to. About 10% less far. Not good for the ego.