The game is old and recreating the tool chain required to rebuild the game might be a massive work investment. It probably is even less save, because the build

The game is old and recreating the tool chain required to rebuild the game might be a massive work investment. It probably is even less save, because the builds differ and perhaps behave differently and you might even need a full QA cycle. The likelyhood of an old crack working more flawlessly is higher.