The different units are pretty obvious. Over here we still stick to some obsolete units too because they are handy in everday life. I think thatīs just part of the culture.
Some European countries have different grid references and zero levels. Not too long ago the ends of a bridge failed to meet because of that. Of course they only noticed it when was too late to keep it secret. At our office we had a good laugh about that (needless to say that we werenīt involved in the construction work). Many people still wondered how this could happen.
_________________________
If it isnīt broken, it doesnīt have enough features yet.