 * Oppose:Not all of the prefixes discussed in the article are SI prefixes.  We have a whole section on disallowed and obsolete prefixes which never were SI.  I don't agree that it has no bearing that some prefixes pre-date the SI nor that they are used outside the SI.  The SI is a metric system so any SI prefix is also a metric prefix.  Thus metric prefix is a broader term.  It's useful to use the broader term in that we can include a discussion on things like myria- which is a metric prefix but not an SI one.  It's also useful in that we avoid getting tangled up in the fact that these prefixes are used in all versions of the metric system not just the SI.  There are kilocalories, hectares, millibars, microergs, etc.; these are all metric but not SI units.  Sure the CGPM decided upon the prefixes but the CGPM has been around longer than the SI.  · 