It's not that novelty wears off, it's that your library of patterns has expanded to the point that fewer things manage to reach the same threshold of novelty.
To continue to experience novelty, you have to find new patterns, not just new things that fit patterns you know.
Or you were 20 years younger in the 90s and things seemed more different because you'd experienced less? I have a really hard time getting into new music these days for that reason.
To continue to experience novelty, you have to find new patterns, not just new things that fit patterns you know.