And this wasn't even the first time. Recall the 68k emulator that shipped in all classic PowerPC Macs.
Both Microsoft and Apple deserve enormous credit for their compatibility work. But Apple deserves special mention for shepherding the Mac through three completely different architectures (68k->PPC->x86) while maintaining excellent compatibility at each transition. Windows has also gone through significant transitions, but within the same x86 processor family.
Admittedly, all the other architectures Windows supported apart from x86 were added and later dropped again, so it were more sidesteps instead of transitions.