Some people just don't get it. At first, it seems you leave the nub in all the time, but the nub serves no purpose, so yes, you plug the whole thing in to charge, unplug the whole thing when you're done (or want to use that ONE port for something else) and if you trip over the cord or drop the Macbook, the connector breaks into two as it's supposed to do.
Those who think you're supposed to leave the nub in the port don't think outside the box much.![]()
From the website linked in the article:
The streamlined magnetic connector is only 12.8 mm deep so you can leave it plugged into your laptop’s USB-C port when not in use.