Mostly in the U.S. It’s been that way in the auto industry forever. What grinds people is that the smaller, mom & pop-type suppliers to the auto industry are mostly out of business. So when you drive up and down Woodward Ave. in Detroit, you see all the vacant buildings, and you don’t see the parts and sub-assemblies coming from Indiana, Ohio, and (yes) Canada.
Yes! A major steel supplier to the auto industry, Great Lakes Steel, that used to be in Ecorse and Zug Island are long gone too. I worded there in the early 1960s as a time study analyst but saw the end coming when management folded to the USW by giving them the moon to prevent a strike.