Gizmodo: The original concept for the MagSafe was simple. It would eliminate the risk of some idiot (or more often than not, just you) tripping over the cord and flinging your laptop off of your desk. Sometimes you'd catch it. Other times you'd have a slightly crunchier PowerBook. And so, when Steve Jobs showed it off in the 2006 MacBook Pro unveiling, that's what he focused on. Fewer broken laptops, everyone's life is easier.
Except, that's not exactly the way that the MagSafe as a fundamentally great thing experience has played out.