Wow, we can save 6kWh/year, but is it worth doing?
First, one would only realize that full savings if the device were never turned on. If it is never turned on, why do you have the device?
Second, assuming it takes a few seconds to remember to turn something off, go to the device, turn it off, then turn it back on and wait for it to reboot when needed, how does the electric cost compare to the human labor cost?
Let's assume the turn off takes 4 seconds and is done 4 times/day. That is just 16 seconds per day or 5840 seconds (1.62 hours) per year. In the US, average cost for electricity is $0.12/kWh (
https://shrinkthatfootprint.com/average-electricity-prices-kwh).
So, one saves $0.72 per year at the expense of 1.62 hours of labor, i.e., $0.44/h. I will pay anyone $4.40 /h for casual labor, but very few people are willing to do that.
John