I would say only pop art is appropriation. Because it literally copies a different piece of art to exist. But it also adds a layer on top of it, changes its purpose, which means it starts with appropriation but then becomes interpretation.

AI also doesn't put any meaning into its "art". People argue that an artist's intent is not the main factor in art, but when there is no intent, is it really art? I don't need to know what Warhol meant, but knowing that he did mean something makes it valuable.