I have no idea how this is a real article that people are wasting their time on.
Of course people use the em-dash, and of course LLMs use them at least 10x-100x more than your average human writer. Also, they add nothing to writing, 99.8% people just use an en-dash when typing where an em-dash would be used in print, and absolutely nothing is lost. Some dickheads (like myself) have used a compose key (or similar) to use actual em-dashes in order to seem sophisticated online.
The only people who need the em-dash, as far as I know, are Spanish-language writers. As for LLM-shaming, isn't it more shameful when you publish an article that could easily be entirely written by LLM, but definitely wasn't, like this one?
edit: articles like this make me want to misuse flagging.
> "(like me) ... in order to seem sophisticated online."
Or like me, because they grew up in a different location, era, or career path where proper typography, spelling, grammar, and punctuation matter more than it does for most (print, web dev, advertising, etc) and now the use of that compose-key is just pure muscle-memory like high-speed "touch typing" is.