Anyone tangentially studying anything scientific with real life measurements in the US is versed in metric. Imperial really is for the dum dums and their precious feel feels.
I just wish ibdidnt have to own 2 sets of tools. Even if we officially swap, im still going to have to keep 2 sets because of all the legacy junk around.
Phillips was going to be the square head, but there pattent / licencing issues i think. Torx is my fav now, but i also understand that its expensive and complicated to manufacture, especially in the past.