I love these discussions when they come up. I used to work on rigs in the north sea. What a mess. Both at the same time. Drilling in meters (still measured daily progress as footage so reports read "footage: 75m"), pressures in psi, torque in footpounds and flow rates in GPM with bitsize in mm. People get so would up with these things, work in it, get a calculator and honestly, who cares! But seriously, metric is just easier. Decimalisation simplifies. Right, time to run, I need to buy a dozen eggs