I think i've seen more people use "-" in emails and what have you more within the past year than ever before and it makes me wonder "did they use chatgpt to write this?"
or I've had project managers on jobs I'm consulting for use "final thoughts:" in docs/emails and I know for a fact they didn't write it. When you use AI pretty much daily for your job like I do you can spot people using it from a mile away. Blog posts, game/movie/book reviews, proposals, emails, etc everyone is using it. Hell you can spot it here on Lemmy and on Reddit very easily. it's harder to find actual real person written content these days then AI content.
and if they use EM Dashes? 100% it's AI.