But the new new generation won't even remember the old internet. They won't know any better. I think this generation is now emerging and this is what the OP refers to.
This generation's parents are part of the generation that grew with the old internet. There's no time period where people will no longer know the consequences of not having privacy online. And if they do, they'll one day reach an age and regret something they said and wish it didn't exist online. They'll end up relearning the lesson. There's a strong "woke" culture that isn't going away with coming generations. The right to privacy is a pillar that people will always fight to protect.