People aren't likely to pre-type their HN and reddit comments in a word processor though, so when you see them on such sites, it's a good indication that the comment came from an LLM and not a genuine person.

I’ve typed comments here on this site in Emacs using a Firefox extension. And often I do it manually since I don’t want to lose three paragraphs to the whims of the browser state.

Not that it matters since I type such characters with my keybored directly. There are dozens of us.

Maybe they are using a Mac (where you type alt-hyphen for a emdash)? Or run Windows and have a numeric keypad (ctrl-minus)? Or they run a browser extension like Grammarly that auto-substitutes?