I believe that, for all of its bugs, the NES version of Final Fantasy is the definitive version of the game. Sure, it’s archaic and half of it doesn’t work like intended. But it’s still a smartly designed game that can bite you if you’re not paying attention.
One of the best examples of the smart design is that the game can be completed by any party of adventurers – even solo efforts. One of the oldest challenges for Final Fantasy is to clear it with a party of that most squishable of classes – The White Mage.