In engineering the metric system is the better of the two...Electrical components data sheets are 95% measured in millimeters and not in thousandths. Each and every mil or thousandth measurement from 0.000 all the way to 0.999 can be converted EXACTLY to 4 decimals in millimeters. Not so the other way...For example: 0.036th is exactly 0.9144mm,
but 0.12mm is 0.004724409449th. This would be rounded off in the inch (thousandths) world to 0.005 which is close but NOT accurate. This procedure can have a cumlative effect over increments and cause a part to be way off in ccuracy.
I'll bite. How do you divide things accurately in thirds using the metric system? One third of a yard is one foot. What is 1/3 of a meter, exactly? Whether metric is better or not kind of depends on what you're measuring, don't you think?