> These sort of projects tend to be pretty large and also fairly binary: either it's complete, useful, and playable, or it's not (yet) complete and it's unplaya

> These sort of projects tend to be pretty large and also fairly binary: either it's complete, useful, and playable, or it's not (yet) complete and it's unplayable and useless. Everything is "binary" if you choose an arbitrary cutoff point. Your example of ScummVM is a bad one: in ScummVM there are games that show nothing but a title screen, games where about half of the game works, games that are completeable but are lacking some aspect (e.g. music/sound effects/animations), games that are perfectly playable and completeable, and even games that have improvements upon the original games. The whole spectrum is present in ScummVM's engines at almost any point in time, as there are new engines constantly being added and others perfected. A game that's completeable but lacks music, for example, is certainly not "useless". The fact that many of these engines are not (yet) complete is certainly not exclusive to game reimplementations. There's hardly any open-source project or game that declares itself "complete"