Would people buy MorphOS/OS4 for x86 if they included no backwards support whatsoever for 68K/PPC applications?
Or are we just assuming that it's a given they'd both include some high performance JIT for such things?
I think it's assumed, after all WinUAE on x86 has a great JIT and backwards support for 68K. For PPC they would have to do something like Rossetta.
