[matthewmacleod]

Apple's "universal binary" seems dubious

There is absolutely nothing even remotely dubious about universal binaries. They were used during the PPC->Intel transition and again for x86->amd64. You can create them right now.

[myrandomcomment]

NeXT shipped a single binary that supported 68000, Sparc, HP and Intel CPUs. This is nothing new.

[kzrdude]

They also used a version of that in the 68k -> PPC transition.