It’s the death knell for text-based social networks. If you weren’t already short Facebook, you should be now.
It might me a death knell for copyrighting.
Even as a casual user, a large number of the accounts I follow are pages, brands, and anonymous accounts (especially on Twitter).
It's interesting because I can't say the same for HN. I only recognize a few dozen usernames and only really feel like I know the personalities of a couple of those people. This is despite having been on HN for far longer (in both calendar time and hours spent).
Unless they use a ChatGPT powered browser plugin to reply to you...
Same goes for dating websites, LinkedIn posts, HN comments...