Let's leave USB for the computers and microelectronics. I can still charge electric trimmers and toothbrush when there's oil/water/toothpaste on or even in the port. It also still trivially easy to break a usb port. On devices with the rubber power connector you can practically bend the plug out sideways without damage. They're also much easier to connect as they're not designed to support 10+Gbit/s of signal integrity.