> When emulating the Apple IIe, only a full-screen mode is available and all native Macintosh functions are suspended while running (a proprietary graphical control panel, running outside MacOS, is available for configuring the virtual Apple II slots and peripherals; however, both native and emulated computer function are suspended during this activity). Macintosh functions and control resume only once emulation is completely shut down and exited.
Arguably, the transition from MacOS to Mac OS X does belong in the list. Apple did a ton of work to provide the Carbon compatibility layer to make it easier for developers to port to Mac OS X. And there was also the ability to run MacOS 9 under Mac OS X using Classic.
It's almost like a reverse transition: instead of getting a new cpu and making it work with the old ecosystem and software you take an old cpu and software and and get it to work with the new hardware (I know the analogy isn't perfect!)