[seiki]

I don't think it is selfish to not know metric. We have just always not used s.i. I don't think it is hard to learn both systems but I do not expect others to do that. Also my phone and probably everyone elses phones has converters for temp weight time lenght even tip and currency. You just need to remember it because I know that at least everyone in america that made it to 6th grade learned the metric system and then learned it again in physical science and chemistry. Its not that hardlol