History is full of examples where a developer/publisher decided to port or remaster a game from its back catalog only to realize they have lost the source code

History is full of examples where a developer/publisher decided to port or remaster a game from its back catalog only to realize they have lost the source code and need to rely on an emulator ROM. Sega, Nintendo, and Capcom I think are the most infamous examples. Of course the hypocrisy is lost on these same companies who for decades have used piracy as the boogeyman to vilify archival work and fair use.