Amiga still exists but it is very expensive, AmigaOS has evolved a lot and AROS is like an open source AmigaOS 3.X that can be ported to other platforms.
Apple can still buy out Amiga and the license to AmigaOS and make high end PowerPC workstations and servers out of them and install BSD or Linux on them. The Amiga One was better running Linux than AmigaOS, so just make an Amiga API WINE like software that runs AmigaOS apps in Linux. Then make Intel based versions to save money.
Just think Apple could use HaikuOS, MacOS, AmigaOS, AROS, Linux, etc on their Mac line using Intel chips, and contribute to their development to take on Microsoft and Windows.
Yet Apple could make a deal with Valve to port SteamOS to their older Intel Macs to make use of them for playing games on them, etc. Give them PowerMac specs as well to make a PowerPC version of SteamOS.