The Metric System
I’m in my 50’s and I used to whine about it until I got my amateur radio license in 2000 and got into building antennas and at the higher frequencies where even a couple millimeters is critical I found using metrics is more accurate due to having approx 25 units (25.4 to be exact) per inch. Now I find myself using it anytime I’m making/modifying a part for a car, again because I can be more precise