This has not been the case since 1889, when the metre was formally defined as the length of a prototype metre bar. So the metric system has not suffered the sam

This has not been the case since 1889, when the metre was formally defined as the length of a prototype metre bar. So the metric system has not suffered the same error for more than a century. Of course, the metric system has not been in use since 1960, but this is also true for the SI.