I work in industry, and am amazed by the decline in use of things like detailed reports. Nobody reads any more. Someone might produce an in depth study of something, and present a summary as a PowerPoint, but that becomes the only documentary output of the work. If someone needs to know more detail, they go and ask the person. If the person get run over a bus, the knowledge is lost.

Even before this trend, there was a lot of documentation that was never intended to be read. Huge piles of what I call "ornamental" documentation, e.g., in fulfillment of ISO-9000 or other regulatory obligations.