I personally didnt suggest DCC was written by an LLM but you only need to see its imitators to see the cheap slop targeting the area.

I mean the first LLMs targeted at authors were built as rpg simulators. NovelAI was founded by the AI Dungeon guys splitting off and doing their own thing. If I looked I am betting I could find community training modules to closely mimic DCC's style and they would be well supported.