The important feature of the metric system, for day to day use at least, is that it plays nice with decimal numbers. I grant you that in this regard Celsius has

The important feature of the metric system, for day to day use at least, is that it plays nice with decimal numbers. I grant you that in this regard Celsius has no advantage over Fahrenheit. However for measuring lengths calculating in thousands of inches, power of two fractions of inches, and even tenths of feet (apparently excavator operators use that) seems more an opportunity to showcase one's mental arithmetic skills than something selected for ease of use.