No worries.
I dunno your age, but Nick likely learned typing on his own or in a class in the 70s. This was widely taught well through the 80s. Typing software kind of died out in the mid 90s.
Interesting catch, tho. A lot of people ascribe the use of the emdash to AI. But the reality is that most gen x’ers read and used this growing up, and thus heavily during the early decades of the internet (which is the bulk of AI training sets).
There’s this neat meta history to all of this. We should write a book. I’m nerdy enough to enjoy reading it.