Cel from St. Paul, MN writes:
Is it OK to leave your computer on, and let it turn off by itself, instead of shutting it down?
Your computer probably isn’t shutting off, but entering a sleep or hibernation mode. The advantage is that it is usually much quicker to start a computer from sleep mode than to turn it on. You will use a bit more power keeping it ready to turn on and depending on the model, there might be additional wear and tear on the device. It’s certainly not harmful to let it sleep instead of turning it completely off, especially if you use it frequently.
But, remember some updates won’t take effect until a computer is actually restarted and it’s not a bad idea to restart the computer now and again. Check out this article for more information.