Maybe to save power? Not on all hardware the sleep modes like suspend to ram work reliable. I turn of my monitor whenever I go away for more than ten minutes, and power off the PC when I go away for longer than 3 hours. And PC is a Intel NUC which consumes only 17 W in idle, I assume some of us may have still PCs which consume more. Fessenheim Fessenheim Nuclear Power Plant - Wikipedia was shut down today finally!