Well... luckily WinUAE comes with source, so anyone is free to add PPC (BPPC/CSPPC if it is going to work with anything) emulation.
OS4 for cybppc is very outdate and seem not update anymore.So have running OS4 on winuae make absolute no sense.
If somebody want run MOS, the best way is use sheepshaver, emulate a Mac mini and install MOS.
then maybe MOS can use by more users on cheap Hardware and i can test myself how fast OWB on MOS work ;-)
But whats the problem to run MOS on sheepshaver currently.I dont know anything about MAC.