I went through a period of about 2 months last year where my cable internet disconnected randomly, and my cable modem rebooted every time. Sometimes it would do this about 50 times a day. I spent weeks upon weeks trying things like firmware updates, tweaks, and even rewired the cable in the house. Nothing fixed it. It was apparent the problem was somewhere upstream, but the cable company would not admit to anything, and wanted me to spend big $$ to send a tech out. Yeah...so that's why "fuck always-on".