They forgot to take into account the power consumed during reboots and power offs to overcome the system hangs.

Taking those into account processing all that bloat costs a fortune when combined with spinning the disks up and down during the guaranteed numerous hard resets.

Remember this one:
"the mouse has moved - you need to reboot for this change to take effect"

Hoorah, If everyone at home converts RIGHT NOW we can make the 10% cut in power consumption needed to stop electricity rationing being implemented this winter in NZ.