The goal here is less implementing pong and more achiving the pong arcade machine, a seminal piece of computing and gaming history.

Similar to bsnes (now higan) whose primary purpose is less being able to play games and more reproducing how the systems behaves, even if that's inferior in some cases (because it doesn't work around bugs of the original software), because in theory it allows running all software for the system correctly as long as they can be dumped, and thus actually archiving the entire software library rather than just some, or an altered form of it / them.