> LinkedIn is totally useless at this point.

I agree, though in the context of this thread I'd add that LinkedIn was already useless before LLMs.

The site was already lost to nearly infinite corporate bro platitude posting long before LLMs started to see widespread use.

LLMs likely increased the overall amount of worthless posts on LinkedIn by a significant amount, but I don't think they changed the percentage as very nearly 100% were already worthless for a decade or so now.