In Canada we adopted the metric system many years ago, and I have learned it of necessity.
In the beginning it seemed like it would be strictly enforced (don't know how) and the switch seemed to be complete. I remember seeing an architectural metric house plan. The standard measurement was millimetres! YUP, can you imagine?

An 8' x 12' room = ~2438mm x 3658mm.
Do you think carpenters at the time welcomed that change? lol

Since then it seems like the "laws" have slipped a little.
You can still buy a 2x4 at the lumber yard and items are sometimes advertised by the pound.
I pity the school kids here nowadays. They have to learn the metric system only to run across these anomalies.

It's a good thing the dollar was already divided into 100.
And that's my 2¢ (CDN).

LLOYD S