I've heard several Apple 'Geniuses' say that if you wrap the cables around these flaps then the cable will eventually get damaged. Customers routinely reply: "why do you put the flaps there if using them will damage the cables?". Perhaps Apple has removed them because they end up damaging the cables. I've also noticed that the USB-C charge cable seems to be thicker/more rigid than the magsafe 2 charge cable.