Hell, I can fantasize about one right now: make a specialized Apple USB-C charger cable with a plug a teensy bit smaller than standard USB-C, then magnetize the encasing of the plug. In addition, the furthest left and right side USB-C ports on the MacBook should be magnetic where this encasing would touch the port. This would make it so that the plug itself is loose in the socket and is purely held in place by the magnetism.
Of course this means that particular cable is only suitable for use in MacBooks as it would slip out of regular USB-C sockets. It should have a clear Magsafe symbol because of that.
In a further iteration, that kind of magsafe-C port could even be added to iPhones and iPads.
https://www.amazon.com/Magnetic-Adapter-iSkey-Transfer-Compa...
[1]: https://www.amazon.com/Magnetic-MacBook-Charging-Braided-Dev...