For decades, Apple's Macbook charger brick offered much more functionality over traditional laptop's for many reasons, but why does it come apart?
Apple designed the charger for the Macbook to come apart so that a user could swap out the power plug to suit the standard of any specific country without having to use universal adaptor plugs. This also saved Apple millions of dollars to develop charges for specific countries as it is far more effective to just develop a small component that could be swapped out.
Furthermore, if a user wants more range from their Apple Macbook charger, they could also invest in an extender cable that connects directly to the standard Macbook charger which gives the user an additional 2metres of length.
On the back of the charger, you would normally find two clips that fold out so that a user could conveniently wind up their cable when transporting their Macbooks, but this feature was removed on Macbook chargers from 2015 onwards as cables would fray and eventually break. To discourage users from winding their cables up, Apple made the charger to Macbook power cable removable from the power brick itself.
Take a look at the video below by the YouTube channel: Apple Explained on Why The Mac Charger Comes Apart...