"I'm also concerned with the impact of LLMs on the quality of information."

You have finally made an astute observation...

I have already made the assumption that use of LLMs is going to add new mounds of BS atop the mass of crap that already exists on the internet, as part of my startup thesis.

These things are not obvious in the here and now, but I try to take the view of - how would the present day look, 50 years out in the future looking backwards?