> Wasn't expecting to learn that the internet "weighs" about as much as an apple.

Something doesn't make sense here. An electron is 1/2000th the mass of a proton. So 1/2000th of the mass of your hard disk is its electrons. So they're saying the entire internet runs on thousands of hard disks? That seems off by several orders of magnitude... what are they measuring?

The following are all based on assumptions I'm making.

The type of people who are likely to make analogies for how much the internet might weigh are almost certainly not physicists. They're probably smart, and they're probably used to doing math (programmers), but they might miss details that career physicists would think are obvious.

Only some of those electrons can move freely.