I mean as an engineer who deals in both I would say that Metric is a much better unit of measurement than Imperial. Conversions all make more sense being that they're all based on units of 10 instead of the imperial standard's logic of "well a king 600 years ago decided this makes sense so let's keep doing it". Also the US is the only 1st world country still using standard which is why we needed to change. The change was absolutely done for monetary reasons. GM like pretty much every other automobile manufacturer is an international company and it doesn't make sense to make a specific set of tooling for one country. Plus it would just add an additional opportunity for mixups to happen on the production line which isn't good for anyone.I did not like it when the US started with this metric crap, but It is obviously here to stay. I guess we have gotten used to it by now. I know the reason was to have a standard around the world. So we switched to using the same standard that other countries use. Why did we have to be the ones to change? No doubt that the manufacturers did it for monetary reasons. Sorry about the rant. It is definitely an old school feeling.