yes, they break down
But why do you see honda accords and toyota camry's with 200,000+ miles on the road with original trannies, engines, etc. when all my friend's pontiacs(GM) need new heads at 100,000 or a new tranny at 130,000, keep in mind this is just one small example, but I belive very relevant. The answer? R&D! For years, GM has concentrated on stock prices, give the money to the shareholdrs, while Toyota and Honda on average put more money into building better and better parts and products.
On the topic of what happens to the Honda plant people (another generalization). If they truly have it way worse, than I admit, I'm an iggnorant prick for not caring. I just want the best product. I'm a motor sports enthusiast, I'm interested in the best product possible. Subscribe to Car and Driver for god sake, and read about the differences in car performance. That's all I'm interested in, and if that's conceited, so be it.