I have a keyboard macro set up so typing “—-<space>” yields “—”. I set this up like a decade ago and it’s just habit now.

That evidence is laughable.

I learned about em-dashes from one of clients who used them. She used Microsoft Word it took a chord key sequence but was in her skill set. I think it was shift-option hyphen.

I think using em-dashes to detect LLMs reveals the divide between computer science and liberal arts.