It's a mechanically sound connector. I always found it weird that with USB-C, you are inserting a plug with an open center in to a port with a small tab on the inside. It seems like inserting a thicker tab in to an open slot would be stronger. But then there could be some peculiarities of cable manufacturing that make USB-C smarter than it seems. That or it isn't better because it was designed by committee, and we only use it because that committee sets standards.

Granted, the pluggy-end of a battery is a pretty benign place to put it. Apple probably has warehouses full of these connectors that need somewhere to go now that OEMs won't pay to license it. Dropping it in a battery is sorta annoying and arguably obsolete but also not the end of the world.

Now, if they could axe Lightning on the Magic Keyboard/Trackpad, that'd be greaaaaaat.