For security reasons - particularly for the non-router using among us - turn off or disconnect the broadband connection whilst you are away.
NASA studied computer use and the issue of power off during inactivity as it relates to hardware longevity and they found the following:
There are several negative factors affecting the life of electronics -
Initial Start-Up power spikes and drive spin-ups.
Heating/Cooling cycle is cumulatively degrading for electrical connections (even within a chip)
Constant power-up brings with itheat issues - heat is the enemy of electronics. Also, drive bearings do have a limited life-span.
What they found is on average, if you are to be away from your PC for more than 6-8 hours, turn it off - otherwise the initialization and cyclical wear factors begin overtake the heat/wear factor as the primary cause for failure.