Hmm, maybe it got better at this but my experiments a few months ago were pretty underwhelming. It did ok at emulating really distinct styles with lots of examples (Shakespeare) but surprisingly badly at more subtle styles with less examples (Tupac). In the latter case it would revert to default-speak after a while, with the odd bit of vocabulary thrown in. Tupac's entire ouevre is online, so it should be able to emulate him flawlessly. How much of my text will I have to feed it so it sounds like me?

My point is that we learn to write by reading. If someone is constantly looking at chatGPT output as exemplar that's going to change the way they write. The comment I was replying to is classic default GPT style, especially that last paragraph, even if it was written by a human.