Machinists also don't like the metric system much. There's no metric unit that's anywhere close to the mil (thousandth of an inch). So in fabrication work, yo

Machinists also don't like the metric system much. There's no metric unit that's anywhere close to the mil (thousandth of an inch). So in fabrication work, you're forced to either use large, oddball numbers of micrometers, compromise your design by moving to 1/10 mm precision, or hose your budget by using micrometer-level precision.