Not that I think that’s going to happen but the option now exists to balance the narrow body fleet more evenly across both brands, with Mango having a 70% cost advantage over SAA it doesn’t take a rocket scientist to work out where things will end up long term.
Similar to what has happened with QANTAS and JETSTAR. If I understand it correctly, if you want a command in QF, you first need to go JETSTAR, do your command there (at reduced pay) and wait for a slot in mainline.
Saves a bit of money