Just to stir the conversation a little teeny bit, many manufacturers were quite happy to build cars for donkeys years from crappy steel with loads of cavities acting as mud traps so that they would rust at the merest sniff of road salt weren't they?
Not mentioning any names here (Land Rover), if they were that worried about the customer experience they could have predicted very early on that galvanising chassis and bodies would extend the life of the vehicles considerably but that isn't a good business model is it?
Anyway, what are these little things we're discussing?