Maybe the binary runs, but for any non-trivial I/O (GUI, 3D, specialized input devices) you're still dependent on specific interfaces which are probably not the

Maybe the binary runs, but for any non-trivial I/O (GUI, 3D, specialized input devices) you're still dependent on specific interfaces which are probably not the same anymore. Case in point: try running any of the Loki Linux game ports from 20 years ago on a modern distribution...