Asklemmy

Okay, so I see someone else already did an effortpost, so I'll just add on.

Benjamin Franklin assumed logically that electricity obviously must flow from positive to negative (since it’s the logical choice), but alas, he was wrong as far as history sees it.

Well, I'm sure he knew it was a guess. He was a smart man. He picked glass as the thing that picks up "electric fluid" in static electricity experiments, becoming "positively charged", in other words a positive excess of fluid, when in fact it loses electrons. Until someone invented vacuum tubes a century or so later nobody could tell the difference.

Positive-to-negative is called "conventional current", and circuit diagrams are still drawn that way. Unfortunately, the charge and direction of the particles moving (rather than just that they are moving) can become important if you want to understand electrochemistry, for example. Metal ions are positively charged (missing an electron), and so they're going to come off of the electrode where electrons being removed, and plate on to the electrode where they're being added. You have to remember the conventional current is opposite to the actual current to picture a battery running a circuit, and if it's connected to a bunch of digital chips in a complicated way, I, at least, can get lost.

If that's still unclear, any further questions are welcome.