"You would need a tap on every one of thousands of transformers..."
Oh, so the frequency on the secondary (output) might be different than the frequency on the primary (input)? If this slight delta frequency happens, and then remains in place for an extended period, exactly how many total cycles can be stored in the transformer? If you store enough cycles, will it act as a UPS?
Gotta luv it when the so-called experts wheeled out haven't got the slightest clue about how the Universe works.