Weren't we supposed to start using it 30 years ago? I remember some piece of legislation being passed.
Ford signed.......Reagan made it go away.
When we look towards our own National standards, we don't have a standard pound, we have a standard kilogram (K20) it is based on the kilogram in france.
The standard for length used to a meter bar, now it is the time it takes light in a vacuum to travel one meter.
Many of our standards are moving towards physical laws, which in the end everything is in SI units, so I do see it coming.
The hardest thing to do is converting all these blueprints and drawings for everything know to man in the US. Conversions, while they work are not at all precise depending on their application.