Even LLMs from years ago could accurately mimic the style of any sufficiently famous author.
Yeah and it's degraded significantly since then. Older llms were still mostly language focused and had a lot of latent knowledge about things like writing styles. Now it's crowded out in favor of agenetic work, programming etc.
At best it can use some of the same vocabulary. Often not even then.
LLMs from years ago weren't aligned to death like these days. It's hard to get rid of "AI smell" than years ago.