Soon email clients will be detecting GPT generated content and show warnings.
Gmail also offers to compose your entire response as long as you keep it brief (Smart Reply).
Edit: I typed a few sentences I made up myself and it judged them >90% fake. I don't think it works very well.
That's the next level of hell: customer service rejects your request because it believes an AI wrote it (even though you wrote it yourself).
Coming soon to BigCorp.
Three full, generated, job related letters were detected as 99% fake. One was falsely detected as 99% real.