Earlier quoted context omitted.
Nah. I NEVER say the dash pre-AI, at least in commoners writings. Maybe in some books etc. The dash you read today is 99.9% AI generated.
Where do you think the LLMs got the emdash from? When I worked as a magazine editor we took good care to discern ndash and emdash in printing. In Germany it is a Bindestrich (which links words, hence "bind") and Gedankenstrich (this is where you have a pause in thinking and continue the sentence afterwards).
You cant argue about this, just looking at github, i never saw dashes used pre AI. Today you see a dashes in code comments, PRs, issues etc EVERY time. Its all AI generated.