There may be reasons his Obi is not powered on all day.
For example, my neighbor uses a gas generator for a few hours of electricity and is powerless the rest of the day. If he had a need for an Obi I would have come up with a battery-powered solution, but in his case, he would not have had an internet modem or router powered up either.
While many people in the U.S. have electricity and water all the time, it is not the case elsewhere.
Many people in my state rely upon rainfall and catchment tanks. They also get water totes ($250 or so), a plastic container in a wire frame and go to the public water tap for free water and drive home with it. I personally have 80,000 gallons of catchment water and 2 large totes here on my land.
One of my neighbors up the hill has no cable or DSL. He had to get a Verizon unit to get data service and use its wifi to get his local computer on the internet.
So as I say, not everyone has the luxury of others may have.
The OPs mileage may vary :-)