AC supplies are not 100% assured and home/other electronics must survive power outages.
Just so you know, there are 500+ answers to the age old power on/off question if you want to plow through it. At the end you either have a pounding headache or make a choice.
I want to control my cd-player's power on/off time periods automaticly using a timer on the power supply for that player. The problem is; I heard that powering off/on a electronic device such as a cd-player is worse to do it by cutting of the power, instead of pressing the power button on the device first, and than optionally cut off the power. I tried my local electronica shop with some so-called experts on the area, and they told me it doesn't matter. I'm not really convinced, so could anyone confirm/reject this advice?