I used to work in an automotive plant in Ontario, Canada that supplied powdered metal driveline parts for the Big 3 auto makers. The manufacturers supplied part drawings in Metric. Our engineering department converted these these to SAE to develop tools (dies, punches, etc.) to make the part. So, to say that Canada changed to Metric, it is not entirely true.
I worked in Q.C., and was responsible for the calibration and setup of all the production gauging. It looked like, before I started there, the govt. must have handed out $$$ to convert to Metric gauging. There were all kinds of metric indicators, micrometers, gauge blocks, etc. still in their boxes, never used. The plant closed last year, and I imagine all this stuff went to scrap, in brand new condition.