Re: Charge by wire
"I've never had a USB port fail - its always the plug that fails by design. I dunno what you're doing with your phones..."
Depends how old the phone is - IIRC in the days of mini-USB it was the socket that tended to fail, which was one of the reasons why micro-USB was redesigned to make the plug the weak point.
Also, micro-USB sockets, like any other uncovered recess on a device which spends significant amounts of time stuffed into a pocket, are far from immune to ending up getting themselves well and truly clogged solid with compacted crud. Again, this might not be a problem if you're in the habit of getting a new phone every year or two, but if you do find yourself hanging onto a phone for longer than this then there's a good chance the build-up of crud will start to reach critical levels, preventing the plug from mating cleanly with the socket.
Annoyingly, unlike lightning sockets where I first encountered this problem, micro-USB sockets are bloody difficult to clean out properly due to the contacts being on that central finger rather than arranged around the edges of the socket - you need a rather thin crud-hoiking-out tool to squeeze past this without causing it to bend alarmingly off to the side, but said tool still needs to be sturdy enough to then be able to make a dent in the layer of crud.
And of course, even if the socket and plug combo is designed so that the socket never clogs up, and the plug always wears out first, the socket is still soldered onto the PCB inside the phone, and will almost always only be held in place by those solder joints - you might get some assistance from the way the phone case wraps around the socket body, but every time you ram a plug into the socket, or yank a plug back out of the socket, you're stressing those joints, and sooner or later they're going to give way. If you're lucky they'll do so in a way which means you can still use the socket so long as the cable is held at just the right angle to push the broken joint back together, but if the break is bad enough then it's a case open repair job...