Are you kidding? If the console doesn't sell well or good software stops coming, it will die just like that.
If we want available hardware, just do the OS on a PC. That will be around for a while. If we want GOOD hardware we must make our own.
Using any other processor but the native one will result in basically running an emulator, degrading performance as hell. If that's what we want, just code a WinUAE for AmigaOS 4