I'm only thinking of one way why at the moment: bots are now an easy thing to make. The amount of threads on reddit (and all social media) that are just ChatGPT/some fork/GPTx, etc. trained on a specific topic such as politics is going to explode.
it's already a thing, but now its more accessible and any manual part of posting/responding is removed. Not only removed but replaced with AI/ML, creating a better "bot" while increasing surface area
I think if the dead internet theory wasn't true before, its about to be