[lmm]

> They buy the top of the line. And will build their own parts if it doesn't exist. It's not unusual for subway cars to run for millions of miles and last decades. The R32's were deployed in the 1930's and lasted until the early 2000's [0].

That doesn't seem to contradict th idea that they've spent far more money maintaining obsolete equipment when buying new would be cheaper overall. (Not really "boots theory" though).