In what sense survived?
Today's "Macs" are nothing to do with the Mac that was around in the Amiga's time - different hardware, different OS, only the trademark name remains. Windows today is a derivative of NT, not the DOS or Windows 9x we knew back then.
If Commodore had have survived, any modern "Amiga" would similarly likely have been a very different platform, only sharing the name (e.g., consider that Commodore's plans were at one point to move to RISC machines running Windows NT).
In an alternative Universe, it might have been Commodore who bought NEXT, and slapped it on x86 machines as "Amiga OS X"...