Apple is going back to how home computers used to be, before Compaq got lucky with the IBM PC cloning.
They were consumer electronics devices, most of the expansion possibilities were via external devices connected on an expansion port of some sort, and that was about it.
Naturally this model offers better margins than selling PC components on thin razor margins, which is why even the PC world is going into that direction, leaving custom PCs for hardcore gammers and servers, where OEMs can also enjoy higher margins.
They were consumer electronics devices, most of the expansion possibilities were via external devices connected on an expansion port of some sort, and that was about it.
Naturally this model offers better margins than selling PC components on thin razor margins, which is why even the PC world is going into that direction, leaving custom PCs for hardcore gammers and servers, where OEMs can also enjoy higher margins.