It's hard to "make people think" in the different unit system. I'm in the UK and people talk about sizes in feet and miles all the time even though the society is supposed to have switched to the metric system.
There are places like on product labels where both units should be mandatory. Hopefully in a few generations people will gradually switch over.
There are places like on product labels where both units should be mandatory. Hopefully in a few generations people will gradually switch over.