Yeah, I know the argument, but how many people in industrial society know how to do anything? The engineers build the systems that the factory workers use. In f

Yeah, I know the argument, but how many people in industrial society know how to do anything? The engineers build the systems that the factory workers use. In fact, the workers generally know only one subset of some problem that is being solved by the manufacturing process. You have to be able to show how this "knowledge gap" causes a collapse because the "new engineers" fail to understand the building blocks and the systems will erode over time. As long as the standards exist someone can "follow the recipe." I can totally concede that over long epochs of time of stability there would be a wax and wane of technological prowess and that at some point interest, or active knowledge, would be lost. But as long as the knowledge is still there then it would not take much for this future society to repair and regain its knowledge. I see absolutely no justification for a collapse scenario. Your CoD LARPers will have to unclog their toilet eventually.