Harry Bloomfield wrote:

None of your tech equipment cares about the voltage and will simply
increase their current draw for the decrease in voltage, so what am I
missing?


Well, that's not true Harry. Anything with a transformer and a linear
regulator is going to use less energy as the mains voltage falls right
down to the point where the dropout voltage in the regulator is reached.
The regulator will then shut down and your tech kit won't be using any
current at all...

IOW Up to a point, for linear regulated power supplies, reduced mains
voltage will reduce unnecessary heat dissipation (and more than likely
prolong the life of the electrolytic caps to boot.)