I'm not an enthusiast - I'm equally adept in either. I prefer imperial, but can move smoothly and without paused between different standards.
In these modern, international times, it is as poor form to be adept in the use of only a single standard as it is to be able to speak only a single language. I would no sooner want the entire planet to go Metric (or indeed imperial) to the exclusion of all other standards than I would for them to speak a single language to the exclusion of all others.
Knowledge is power. Ignorance is simply, well, ignorance.