I wish the US had made the switch to metric back in the 70's. I remember having to learn it in grade school, and there seemed to be a push for it, but never went anywhere. I now work as a chemist where everything is done in metric, but then go back to US measures once I punch out for the day. Would be nice to have a single system instead.
In fairness... Most of the "behind the scenes" are done in metric so we kind of did convert to metric. It's mostly just the public that is imperial still.