FWIW I have noticed that they’re often used incorrectly by LLMs, particularly the em-dash.

It seems there’s a tendency to place spaces around the em-dash, i.e. <word><space><em-dash><space><word>, which is an uncommon usage in editor-reviewed texts. En-dashes get surrounding spaces; em-dashes don’t.

Not that it changes things much, since the distinction between the two is rarely taught, so non-writing nerds will still be quick to cry ‘AI-generated!’

Incidentally, you seem to have been shadowbanned[1]: almost all of your comments appear dead to me.

[1] https://github.com/minimaxir/hacker-news-undocumented/blob/m...