Casablanca is a famous example of this too.
And LOTR, though in that case coming to it after reading Terry Pratchett was difficult for me (Pratchett didn't just copy its, or other, fantasy tropes, but send them up in an exceedingly clever way).
Yeah, there’s a bunch of these. I really like finding these sorts of “ur-“ moments, the first time a way of doing things really crystallizes into something other practitioners can see. The Matrix is another one - that movie is the transition point from 90s cinema to the 2000s, and it’s a little clunky from a 2000s viewpoint, but if you look at everything that came before it, it’s so clearly a turning point.
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Having read LOTR many, many times before I ever started trying to read Pratchett, I can't read Pratchett. That's not a slam at Sir Terry; I'd just internalized Tolkien so much that it was beyond my ability to properly appreciate him.
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https://tvtropes.org/pmwiki/pmwiki.php/Main/SeinfeldIsUnfunn...
I think there was a case of a movie reviewer for some newspaper panning LOTR because of how "generic" and "derivative" it was. I don't know if that's true or an urban legend, though, but I can see it happening.
I also think its going to be a problem for the upcoming Neuromancer series. Unless they change a lot of things, the plot as written is practically cliche at this point, and a lot of it doesn't even make sense outside of the specific technological and political context of the time.