Veronica Explains on Nostr: Now, I'm not a network historian, but here's how I was taught. Earlier registered ...

Now, I'm not a network historian, but here's how I was taught.

Earlier registered jack connections had two wires. For the sake of understanding let's call them "the two blue wires" (but they weren't always blue, this is a simplification).

When two more wires were added to the mix (let's call them "the two green wires" even though they weren't always green), they were added to either side for ✨compatibility reasons✨.

Contracts required it, so standards were built around it.