There's usually a context difference that might might be significant. People don't write the same way way for an email, like they would a letter, text message, or tweet.
They might write more like an LLM for things like essays and reports, but your usual writing is probably still fine. Then classics that inspire people to write are still around, and I doubt that they would be supplanted by an LLM any time soon.
We might start being in trouble if people start republishing books with them, but that's unlikely to to happen any time soon, considering the current state of copyright around AI works.
It's not a complete ban, but it does mean that you'll stop updating with new posts and comments. Users from elsewhere won't see any new content on their copy of a beehaw post, and you won't see any new content from a Defederated instance.