Mass production was just one aspect of the industrial revolution, mainly developed in the US. Other parts of the technological change were as important, increasing productivity, the development of machine tools etc. Now capital costs for tools are coming right down as they turn into software, big companies are not so necessary as they were just a source of large capital. Newspapers were big because printing presses were hugely expensive. As industries lose the need for huge capital big companies will go, as their command structures are less efficient than agile markets of freelancers and small businesses.