Proper Metrics

How many times have you heard this:  “How much further?”  “5,000 kilometres.”  (where are you going?!).  Does this seem a little strange?  Let me put it in a different way.  What if I told you my CD holds 700,000 kilobytes (you still use CDs?)?  If people say 700 megabytes for storage then why don’t they have the decency to say 5 megametres for distance?  For those using miles and yards, you can ignore me and go play with your archaic measurements.