What matters is how many white collar keyboard warriors will sit there and act they know better as if they have a clue about machining or its history lol. I promise you in those 190 countries there are many still using SAE for lots of processes. Guarantee you not a chuck key on the planet isn't in standard even if the rest of the machine is metric 🤷 do NOT take this as me stating that SAE is somehow better, I'm just stating the fact that machining was born in SAE, and if your lathe is more than 40 years old (the lathe I work with is from the late 1930s) it WILL be in standard. In whatever of the 190 countries you are in what size drive turns your sockets? Oh right, quarter in, 3/8ths, or half in. What unit of measure is the wheel on ur car? Right, inches. Globally some stuff has just stuck with SAE for reasons I cannot explain. You don't have to like it, it's simply the facts of the world.