> I have no qualms about whether AI finished this, just enjoying the fact that nostalgia can be invoked more easily and cheaply than ever before.

Maybe making nostalgic experiences available so cheaply is not a good thing. For me seeing mods and reimaginings of old games is interesting because people puts lots of effort into them with attention to detail and their own ideas. Someone recreating Half-Life 1 with modern graphics using AI is not going to create something as cool as Black Mesa, for instance, which didn't attempt to make a 1 to 1 recreation but to improve things and make it fit with more modern graphics.