[etblg]

The em-dash tell makes sense for things like personal technical blogs, usually written by a non-professional writer, and without extensive editing.

It doesn't work so well for things that are professionally written and edited, in my opinion. I saw a similar statement in a thread about an nytimes article.

Em-dashes were not invented by AI, publications used them before, it's not strange that someone whose job is to write will use them, and its not strange that something professionally edited may have em-dashes added to it. It's only a tell when someone who has never before used one before (or is not likely to have ever used one before) suddenly starts throwing them around like candy.