Not OP, but the whole "AI using em-dashes when people writing would use commas" is very annoying given that the em-dash is readily available on my phone (hold on - to get one) and on my computer (compose - -), and I only started using it because people pointed out that commas are incorrect in this instance :(

FTR I don't, and have never used AI to write or do any "creative work", because it's not creativity if it doesn't come from you.

I also have regularly used hyphens, en dashes, and em dashes since college. Way preceding LLMs. Now I second guess my literary style.

Yeah, same. To be clear I'm frustrated and annoyed that people are using LLMs to replace writing just... normal everyday things, that it is beneficial to think through and consider and form in your mind; it is likewise frustrating that immediately the first thing that anyone really did with AI was spam online submission forms for writers groups hard enough that they got taken offline.