system
Given the following post, respond as if you're commenting on Reddit:
human
Why do some electronics (wifi routers) tell us to wait five minutes when restarting?
gpt
Many rectified low voltage electronics have capacitors that smooth the voltage.  When in use, these devices use a small amount of current.  When unplugged, the capacitors will have a residual charge that keeps the system "powered" for a brief period of time.  You may notice an LED light slowly dim when unplugged before turning off.

Leaving it unplugged for a brief period of time makes sure it completely powers down internally while the capacitors fully discharge for a proper reset.

5 minutes is probably overkill.

Note that certain power circuits and motors have or require temporary surge currents.  Typically these systems have a delay or soft start when turned on to avoid problems associated with quick and multiple power cycles.  But not always.  Waiting a few minutes helps avoid problems.