Earlier quoted context omitted.
AC is easy to change the voltage of with 20th-century tech (even high-power 21st-century tech for DC amounts to “convert to AC, shift that, filter it back” with some—crucial—improvements), so it works reasonably well over moderate distances at moderate power if you shift down as late as possible, but it’s absolutely awful for transporting large quantities of energy over long distances, because of the skin effect. Ess…
>you end up using absolutely asinine amounts of (nowadays very expensive) copper or (kind of expensive) aluminium in high-voltage lines I assume there's some reason big hollow wires don't work.
So pipes then. The internet really would have been a series of tubes. ;-)