As Trev said earlier, we went metric in the 1970s, but we still use a lot of "descriptive" terminology, such as "He's very tall, well over six feet"
Or "the surf was big today ... well over 10 foot waves."
There's two funny things I remember at the start of the introduction to the metric system.
The first was a politician trying to "sell" the metric system, who said "It may be difficult at first, but stick with it. If you try to forget the imperial system, and think metric, inch by inch we'll get there."

And another person said "This is too hard ..... they should have waited until all of the old people died before introducing it." smile

Cheers,
Keith