I think many of us miss that feeling... For me, the level of complexity of the computers in my childhood (TRS-80, Spectrum) made them interesting but still possible to fully understand. I think we have lost that - modern hardware and software has complexity on a scale which makes it impossible to fully follow. After decades of computing, I only have a high-level understanding of many components of a typical PC. So for my son, any understanding of what's going will be difficult...