My fave is the semicolon; however, I refuse to cede em-dashes or any other punctuation marks to ChatGPT.

These attacks on the em dash — a ChatGPT hyphen? How very dare you! — have in turn blazed across social media spaces populated by the kind of folks who will tell you, unprompted, that they have a favorite punctuation mark and what it is. (It is very likely the em dash.) — https://www.salon.com/2025/06/11/ai-cant-have-my-em-dash/