Comment by tpmoney

I did wind up replacing the USB C ports on a 4 year old computer recently because it was dodgy as hell. When i got it under the microscope it the longer bus power pin contacts (and one or two of the others) had been badly worn/squished/stretched in a way that I guess was causing them to bridge to other pins. I assume some USB-C cable had some gunk in the connector which was hard enough to damage the contacts on the center blade, and the user didn't notice (because how often do you look into the end of your USB-C cable?). It probably presented as a cable that wasn't seating right or didn't go all the way in and whatever was inside probably fell out when it was removed and they tried again.

And for what it's worth, damage to the center blade does seem to be a common failure mode for USB-C and mini-usb connectors. Less frequent for something like HDMI but it does seem to happen from time to time. Lightning never felt like it locked in as securely as USB connectors do, but at the same time, every time I saw a damaged lightning connector it was always on the male (and therefore usually cheaper accessory) side.