There wasn't any known active AI back then, but statistics on popular ideas and internet content was already a thing, and speech pollution based on those assessments had already started to spread fast, manually outputted.
Sure, a lot of good content came out since then. But the amount of garbage... it's immense and very difficult to sort out automatically.
The major issue is that this garbage then _became_ the norm. Only people who lived back then can remember what it was. For new folk, it looks just like a generational shift. However, it is quite obvious that some aspects of this shift were... unnatural (in the sense of not being spontaneous cultural manifestations).
I mentioned explicitly that I see what happened as distinct from a natural generational shift.
There are many phenomena around that era to support what I am saying. Like, for example, the first massive political campaign to leverage internet as its primary vehicle.
Not sure why you're getting downvoted, content farms have been a thing for a long time, and many a spam website used crappy markov chains to generate even more "content". Anything that could be marketed by company had its search results drowned in hand-crafted bland marketing slop, and even before ChatGPT got popular searching for things like recipes (or, god forbid, generic windows error messages) was a nightmare. And a lot of that garbage is in LLMs' training data.
