Mm. Same on the em-dashes.
Hopefully one of the only ways I'm in a top-10-HackerNews-user list is #7 user of em-dashes before ChatGPT was relased: https://www.gally.net/miscellaneous/hn-em-dash-user-leaderbo...
I guess one irony is that while there's many people here bemoaning LLMs as "nondeterministic", for prose in general it would be much better if they acted like such complainers meant rather than the non-determinism being in such a narrow band as to be an instant cliché.