The other day I read some old blog posts of mine (~2016) and they contain "em dashes". According to you they were all written by AI.

If we give up every bit of punctuation that ChatGPT uses, written language will become much worse.

For the last time.. Word (the program very popularly used by many reporters across the world to write articles) automatically autocorrects hyphens to em-dashes according to the default loaded grammar rules for En-US. The existence of em-dashes in an article does NOT immediately imply GenAI slop.

ChatGPT learned to use em dashes from somewhere. They were widely used before LLMs.

You know posh schools teach people to write with em dashes too, right?