Perhaps also Back In The Day, Big Picture things were over-engineered.
I guess also, ever do a home renovation on a house > 40 years old? You usually walk into a disaster of things not up to code. These days, it would just be done correctly, just as cheap as possible, and not built to last. Most recent housing developments near here are just ways for developers to make money and run, as the infrastructure (housing, not utilities, etc) is not going to last all that long. The developers don't care - they'll be enjoying their profits States away, as the city that is home to their developments are quickly crumbling.
Not that I'm bitter on the changing landscape of my city, or anything. But a housing boom has dark sides.