The economy is dynamic. Steel and iron were replaced by computers and plastics. So as jobs. Alvin Toffler described that mankind evolves from a hunter-gatherer society to an agricultural society to an industrial society to an information society. This century sees a change from the industrial society to the information society. The industrialization has made some countries rich. At the same time, being rich has consequences. One of them is a reduction in industrialization itself.
What makes these research great? Because it counters our prejudice. We thought that the decline of industrial city was horrible. Actually, it is just partially true.