It definitely fell off before ChatGPT by at least a few years.

Long before ChatGPT I would occasionally see a LinkedIn post and get suckered into clicking on it.

A waste of time. Every. Single. Time.

It wasn’t quite as needlessly performative. But it’s never been good.

I don't know, it was pretty bad before then too. Famously memed for the near psychosis level of shared performance art, where everyone had to present themselves as hobbyless, status hungry work machines. Maybe it was different if you already had a great network. Everyone I knew job searching hated it.