I also use way too many em dashes (usually as double hyphens), but I also overuse parentheses and commas and just overly long sentence structures. I would like to think that my style remains pretty distinct from LLM output style at the moment.

The thing that really worries me is that as they stop using weird identifiable quirks like em dashes and emoji, it could be that the identifiable trait that remains is eerily consistent grammar. It used to be that people unconsciously treated extremely grammatical text as authoritative, regardless of its actual merit; as such, teachers spent literal decades drilling into me the habit of avoiding grammatical errors. Now that could end up instead just making folks think I’m a robot, and thus to be ignored.

I guess the actual robots will probably talk less about their neurotic concerns, though, so I’ve got that going for me, which is nice.