It's been slowly seeping in since at least the 70s, when the Metric Conversion Act was passed. I remember when I was a little kid in Michigan all the street sig

It's been slowly seeping in since at least the 70s, when the Metric Conversion Act was passed. I remember when I was a little kid in Michigan all the street signage had both kilometers and miles on them. Yet here we are over 40 years later and the penetration of metric is still basically nil (in day to day scenarios, not science/engineering). I'm not convinced America will switch to metric in my life time.