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Thats interesting - how many wires are in the actual sleeve, compared to an older USB?
12 in USB-C (1).
4 in previous USB specs. (2). If the device just needed power, no data transfer, you would just use 2 of those 4.
Oh wow, yeah that must indeed be a pain to solder. Though I guess there's some redundancy built-in, such that if one wire goes down the cable can still deliver something?
You guessed wrong! If one is misconnected the whole thing breaks down :) It's a nightmare for repairability, as the plug is often the first thing to fail
The receptacle is the issue - it can have up to 24 pins (though usually it's 12ish), all bunched up in just a slightly larger space than on a micro usb receptacle which has 4 pins. So it takes some good skill to replace.