The ports on the motherboard are soldered, but you don't use them directly. You attach "expansion cards" which slide into a slot on the laptop case which locks them in place. So those ports seldom see any forces applied to them. All your day-to-day wear (plugging/unplugging, twisting, yanking) is going to be on the port on the expansion card which you can replace for $10. It's basically like a daughter board that is trivially user-replaceable rather than a daughter board that you have to open up your laptop to replace.