Comment by pama

The internet convention in the 90s used to be two dashes for the en-dash character and three dashes for em-dash character. You used a space-dash-space notation that is easy to decipher but the typical dashes variants dont have spaces around them. When I read a text message I dont expect careful typography—in a book or an article I want perfection.

More importantly though, the em-dash-in-a-sentence construct is a way of thinking and the notation is of lesser importance than the way to express oneself. I dont think the current distrust is from the symbol: the LLMs love em dashes for the same reasons many of us do, and, perhaps better than most of us, they have no trouble using the correct symbol.