Yes, it can still be a novelty even if it exists for a long time. The question is whether people continue to value it after it's no longer novel and surprising; if a steady stream of people try it once or twice for years on end it could last a long time while still being a novelty.

I don't really understand that argument. It seems like everything would be a novelty under that definition. Will we be watching 2D movies in 100 years? What about 1,000 years? Even ignoring the halting problem, how can we possibly guess what is and isn't a novelty under your definition?

> how can we possibly guess what is and isn't a novelty under your definition?

By observing the typical behavior of one person using it?

Think of a Chinese finger trap. It's been around forever. And yet one person is not going to play with a Chinese finger trap every day. Once you experience it and figure it out there's not much to do with it. That's a novelty.