I toured the GM Delta Factory a few years ago in Lansing, MI and at the time they were running three shifts at over 60 cars/hour or roughly 1500 cars/day. At th

I toured the GM Delta Factory a few years ago in Lansing, MI and at the time they were running three shifts at over 60 cars/hour or roughly 1500 cars/day. At the time it was built, it was the most modern and automated factory in the world. The thing that impressed me most was that the shell would be assembled for painting, then the doors would go off on their merry way and rejoin the same car hours later right before the final checks so that the paint would exactly match. Lateish edit I forgot to add, all of those crazy robots in the Tesla videos that assemble the vehicles without human intervention? Other manufacturers have relied on those for at least a decade.. It was generally considered proprietary which is why it seemed so novel when Tesla released their promo videos.