Wel they did have the (mythical) AAA chipset...
with 24bit screen and 16 bit sound.. And that was way back
They were opting voor a RISC processor aswell...
If that got trough and the PC open structure never got up maybe it'd still be relative custom hardware.
Mac in some way is also closed...
Can't say. Would the custom hardware structure be broken by outside companies?
PC plug-in cards gave way to new companies, but a closed system would have braked that development.
But if it'd be custom i'd would have worked 1001%
My 2 cents as they say.
No time to close every hole in this post... so fire away :-D