This article completely misses the point from the start.
The reason em dashes are a giveaway for AI generated text is simply because there is no em dash key on the keyboard - only an en dash key. The dash I used in that last sentence was an en dash, not an em dash.
Some publishing applications (including Microsoft Word) will automatically convert en dashes to em dashes where appropriate. But most email apps, chat apps, online posts/comments, and practically any application not designed for writing actual printed publications will not do that conversion for you. And without a dedicated key, it is far too cumbersome for most people to bother. They will just leave it as an en dash.
So yes, the em dash is still a reliable indicator of AI-generated content in many contexts.
The reason em dashes are a giveaway for AI generated text is simply because there is no em dash key on the keyboard - only an en dash key. The dash I used in that last sentence was an en dash, not an em dash.
Some publishing applications (including Microsoft Word) will automatically convert en dashes to em dashes where appropriate. But most email apps, chat apps, online posts/comments, and practically any application not designed for writing actual printed publications will not do that conversion for you. And without a dedicated key, it is far too cumbersome for most people to bother. They will just leave it as an en dash.
So yes, the em dash is still a reliable indicator of AI-generated content in many contexts.