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.