Yes. The old heuristics of if something is generated by grammar and sentence structure don't work as well anymore.
The thing that fucks me up the most about it is that I now constantly have to be uncertain about whether something is human or not. Of course, you've always had to be careful about misinformation on the internet, but this raises the scalability of false, hollow, and harmful output to new levels. Especially if it's a topic I'm trying to learn about by reading random articles (or comments), there isn't much of a frame of reference to what's good info and what's hallucinated garbage.
I fear that at some point the anonymity that made the internet great in the first place will be destroyed by this.
To be fair that was already the case for me before AI, Right at that time that companies, individual and governments found out that they could write subvert ads in the form of comments posts and 'organic' and they started to flood reddit, discord, etc.
The dead internet theory started to look more real with time, AI spam is just scaling it up.
It's still early, and I don't see much in corporate communications, for instance, but it will be quite the change.