Why doesn the US adopt the metric system?
People don’t generally like change. Once they have been raised with a certain system it is very hard to convince them to do it another way. I think converting would just confuse many people and in the mean time the companies who package products would take advantage of this confusion and down size their products even more. I work in a grocery store and you would be amazed to see the incredible shrinking products and the price never lowers.
In the UK we have been forced to go over to the metric system by Europe, although I was trained as an engineer in imperial units i have now been trained in metric as well, although metric is easier to calculate on technical issues it is harder in everyday life. Our road signs are still in imperial, which is confusing for young people who have been brought up on metric. We all prefer imperial units and want them to remain in use, my advice to Americans is to hold on to imperial units for dear life.