Given the vast difference in power, it’d probably have been enough to just cascade all the various layers they already have. Arm > x86 > ppc > 68k
Even if each layer loses, say, 50% performance, the fastest 68k was only 75mhz.
(Although now that I think about it I think the handled the 68k/ppc transistion by just making everyone compile for both and slap em into the same binary. Memory is hazy.. it’s been at least 20 years since I’ve touched a classic mac)
You're confusing the "fat" binary format that allowed developers to ship the same application file for both 68k and PowerPC with the emulator that allowed for compatibility with existing 68k code. Much of the OS and apps remained 68k to the end of classic Mac OS's life.
Even if each layer loses, say, 50% performance, the fastest 68k was only 75mhz.
(Although now that I think about it I think the handled the 68k/ppc transistion by just making everyone compile for both and slap em into the same binary. Memory is hazy.. it’s been at least 20 years since I’ve touched a classic mac)